From caf99694b721dc79d25341d6d3b975e4ef32966c Mon Sep 17 00:00:00 2001
From: henrika <henrika@google.com>
Date: Tue, 21 Jul 2026 00:38:45 -0700
Subject: [PATCH] webrtc: Replace raw pointer logging with tokens in MediaStreamPowerLogger

Bug: 518100026
Change-Id: I8b442d5648f2cab333a07a60093defd15c11975f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/8124755
Reviewed-by: Thomas Guilbert <tguilbert@chromium.org>
Commit-Queue: Henrik Andreasson <henrika@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1665243}
---

diff --git a/content/browser/renderer_host/media/media_stream_power_logger.cc b/content/browser/renderer_host/media/media_stream_power_logger.cc
index 6e92929..30f3f632 100644
--- a/content/browser/renderer_host/media/media_stream_power_logger.cc
+++ b/content/browser/renderer_host/media/media_stream_power_logger.cc
@@ -17,7 +17,8 @@
 }
 }  // namespace
 
-MediaStreamPowerLogger::MediaStreamPowerLogger() {
+MediaStreamPowerLogger::MediaStreamPowerLogger()
+    : id_(base::UnguessableToken::Create()) {
   auto* power_monitor = base::PowerMonitor::GetInstance();
   power_monitor->AddPowerSuspendObserver(this);
   power_monitor->AddPowerThermalObserver(this);
@@ -30,24 +31,28 @@
 }
 
 void MediaStreamPowerLogger::OnSuspend() {
-  SendLogMessage(base::StringPrintf("OnSuspend([this=%p])", this));
+  SendLogMessage(
+      base::StringPrintf("OnSuspend([id=%s])", id_.ToString().c_str()));
 }
 
 void MediaStreamPowerLogger::OnResume() {
-  SendLogMessage(base::StringPrintf("OnResume([this=%p])", this));
+  SendLogMessage(
+      base::StringPrintf("OnResume([id=%s])", id_.ToString().c_str()));
 }
 
 void MediaStreamPowerLogger::OnThermalStateChange(
     base::PowerThermalObserver::DeviceThermalState new_state) {
   const char* state_name =
       base::PowerMonitorSource::DeviceThermalStateToString(new_state);
-  SendLogMessage(base::StringPrintf(
-      "OnThermalStateChange({this=%p}, {new_state=%s})", this, state_name));
+  SendLogMessage(
+      base::StringPrintf("OnThermalStateChange({id=%s}, {new_state=%s})",
+                         id_.ToString().c_str(), state_name));
 }
 
 void MediaStreamPowerLogger::OnSpeedLimitChange(int new_limit) {
-  SendLogMessage(base::StringPrintf(
-      "OnSpeedLimitChange({this=%p}, {new_limit=%d})", this, new_limit));
+  SendLogMessage(
+      base::StringPrintf("OnSpeedLimitChange({id=%s}, {new_limit=%d})",
+                         id_.ToString().c_str(), new_limit));
 }
 
 }  // namespace content
diff --git a/content/browser/renderer_host/media/media_stream_power_logger.h b/content/browser/renderer_host/media/media_stream_power_logger.h
index e268a57..d990629 100644
--- a/content/browser/renderer_host/media/media_stream_power_logger.h
+++ b/content/browser/renderer_host/media/media_stream_power_logger.h
@@ -6,14 +6,17 @@
 #define CONTENT_BROWSER_RENDERER_HOST_MEDIA_MEDIA_STREAM_POWER_LOGGER_H_
 
 #include "base/power_monitor/power_observer.h"
+#include "base/unguessable_token.h"
+#include "content/common/content_export.h"
 
 namespace content {
 
 // Injects system power event log entries into the WebRTC text logs, for
 // debugging of unexpected call ending and performance changes eg when calls end
 // due to a laptop's lid being closed.
-class MediaStreamPowerLogger : public base::PowerSuspendObserver,
-                               public base::PowerThermalObserver {
+class CONTENT_EXPORT MediaStreamPowerLogger
+    : public base::PowerSuspendObserver,
+      public base::PowerThermalObserver {
  public:
   MediaStreamPowerLogger();
   ~MediaStreamPowerLogger() override;
@@ -26,6 +29,9 @@
   void OnThermalStateChange(
       base::PowerThermalObserver::DeviceThermalState new_state) override;
   void OnSpeedLimitChange(int new_limit) override;
+
+ private:
+  const base::UnguessableToken id_;
 };
 }  // namespace content
 
diff --git a/content/browser/renderer_host/media/media_stream_power_logger_unittest.cc b/content/browser/renderer_host/media/media_stream_power_logger_unittest.cc
new file mode 100644
index 0000000..648ad08
--- /dev/null
+++ b/content/browser/renderer_host/media/media_stream_power_logger_unittest.cc
@@ -0,0 +1,86 @@
+// Copyright 2026 The Chromium Authors
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "content/browser/renderer_host/media/media_stream_power_logger.h"
+
+#include <memory>
+#include <string>
+#include <vector>
+
+#include "base/functional/bind.h"
+#include "base/test/run_until.h"
+#include "content/browser/renderer_host/media/media_stream_manager.h"
+#include "content/browser/renderer_host/media/mock_video_capture_provider.h"
+#include "content/public/test/browser_task_environment.h"
+#include "media/audio/audio_system_impl.h"
+#include "media/audio/mock_audio_manager.h"
+#include "media/audio/test_audio_thread.h"
+#include "testing/gmock/include/gmock/gmock.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace content {
+namespace {
+
+using ::testing::Contains;
+using ::testing::Each;
+using ::testing::HasSubstr;
+using ::testing::Not;
+
+constexpr int kRenderProcessId = 1;
+
+class MediaStreamPowerLoggerTest : public ::testing::Test {
+ public:
+  MediaStreamPowerLoggerTest()
+      : task_environment_(BrowserTaskEnvironment::IO_MAINLOOP) {
+    audio_manager_ = std::make_unique<media::MockAudioManager>(
+        std::make_unique<media::TestAudioThread>());
+    audio_system_ =
+        std::make_unique<media::AudioSystemImpl>(audio_manager_.get());
+    media_stream_manager_ = std::make_unique<MediaStreamManager>(
+        audio_system_.get(), std::make_unique<MockVideoCaptureProvider>());
+
+    MediaStreamManager::RegisterNativeLogCallback(
+        kRenderProcessId,
+        base::BindRepeating(&MediaStreamPowerLoggerTest::OnLogMessage,
+                            base::Unretained(this)));
+  }
+
+  ~MediaStreamPowerLoggerTest() override {
+    MediaStreamManager::UnregisterNativeLogCallback(kRenderProcessId);
+    audio_manager_->Shutdown();
+  }
+
+ protected:
+  void OnLogMessage(const std::string& message) {
+    messages_.push_back(message);
+  }
+
+  std::vector<std::string> messages_;
+  std::unique_ptr<media::MockAudioManager> audio_manager_;
+  std::unique_ptr<media::AudioSystem> audio_system_;
+  // `media_stream_manager_` must outlive `task_environment_` because it is a
+  // CurrentThread::DestructionObserver.
+  std::unique_ptr<MediaStreamManager> media_stream_manager_;
+  BrowserTaskEnvironment task_environment_;
+};
+
+TEST_F(MediaStreamPowerLoggerTest, LogMessagesDoNotContainPointers) {
+  MediaStreamPowerLogger logger;
+  logger.OnSuspend();
+  logger.OnResume();
+  logger.OnThermalStateChange(
+      base::PowerThermalObserver::DeviceThermalState::kNominal);
+  logger.OnSpeedLimitChange(50);
+  ASSERT_TRUE(base::test::RunUntil([&]() { return messages_.size() == 4; }));
+
+  EXPECT_THAT(messages_, Contains(HasSubstr("MSPL::OnSuspend([id=")));
+  EXPECT_THAT(messages_, Contains(HasSubstr("MSPL::OnResume([id=")));
+  EXPECT_THAT(messages_,
+              Contains(HasSubstr("MSPL::OnThermalStateChange({id=")));
+  EXPECT_THAT(messages_, Contains(HasSubstr("MSPL::OnSpeedLimitChange({id=")));
+  EXPECT_THAT(messages_, Each(Not(HasSubstr("0x"))));
+}
+
+}  // namespace
+}  // namespace content
diff --git a/content/test/BUILD.gn b/content/test/BUILD.gn
index 3c13273..c5596ac 100644
--- a/content/test/BUILD.gn
+++ b/content/test/BUILD.gn
@@ -2868,6 +2868,7 @@
     "../browser/renderer_host/media/media_devices_manager_unittest.cc",
     "../browser/renderer_host/media/media_stream_dispatcher_host_unittest.cc",
     "../browser/renderer_host/media/media_stream_manager_unittest.cc",
+    "../browser/renderer_host/media/media_stream_power_logger_unittest.cc",
     "../browser/renderer_host/media/media_stream_ui_proxy_unittest.cc",
     "../browser/renderer_host/media/mock_preferred_audio_output_device_manager.cc",
     "../browser/renderer_host/media/mock_preferred_audio_output_device_manager.h",

diff --git a/content/browser/renderer_host/media/media_stream_power_logger_unittest.cc b/content/browser/renderer_host/media/media_stream_power_logger_unittest.cc
new file mode 100644
index 0000000..648ad08
--- /dev/null
+++ b/content/browser/renderer_host/media/media_stream_power_logger_unittest.cc
@@ -0,0 +1,86 @@
+// Copyright 2026 The Chromium Authors
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "content/browser/renderer_host/media/media_stream_power_logger.h"
+
+#include <memory>
+#include <string>
+#include <vector>
+
+#include "base/functional/bind.h"
+#include "base/test/run_until.h"
+#include "content/browser/renderer_host/media/media_stream_manager.h"
+#include "content/browser/renderer_host/media/mock_video_capture_provider.h"
+#include "content/public/test/browser_task_environment.h"
+#include "media/audio/audio_system_impl.h"
+#include "media/audio/mock_audio_manager.h"
+#include "media/audio/test_audio_thread.h"
+#include "testing/gmock/include/gmock/gmock.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace content {
+namespace {
+
+using ::testing::Contains;
+using ::testing::Each;
+using ::testing::HasSubstr;
+using ::testing::Not;
+
+constexpr int kRenderProcessId = 1;
+
+class MediaStreamPowerLoggerTest : public ::testing::Test {
+ public:
+  MediaStreamPowerLoggerTest()
+      : task_environment_(BrowserTaskEnvironment::IO_MAINLOOP) {
+    audio_manager_ = std::make_unique<media::MockAudioManager>(
+        std::make_unique<media::TestAudioThread>());
+    audio_system_ =
+        std::make_unique<media::AudioSystemImpl>(audio_manager_.get());
+    media_stream_manager_ = std::make_unique<MediaStreamManager>(
+        audio_system_.get(), std::make_unique<MockVideoCaptureProvider>());
+
+    MediaStreamManager::RegisterNativeLogCallback(
+        kRenderProcessId,
+        base::BindRepeating(&MediaStreamPowerLoggerTest::OnLogMessage,
+                            base::Unretained(this)));
+  }
+
+  ~MediaStreamPowerLoggerTest() override {
+    MediaStreamManager::UnregisterNativeLogCallback(kRenderProcessId);
+    audio_manager_->Shutdown();
+  }
+
+ protected:
+  void OnLogMessage(const std::string& message) {
+    messages_.push_back(message);
+  }
+
+  std::vector<std::string> messages_;
+  std::unique_ptr<media::MockAudioManager> audio_manager_;
+  std::unique_ptr<media::AudioSystem> audio_system_;
+  // `media_stream_manager_` must outlive `task_environment_` because it is a
+  // CurrentThread::DestructionObserver.
+  std::unique_ptr<MediaStreamManager> media_stream_manager_;
+  BrowserTaskEnvironment task_environment_;
+};
+
+TEST_F(MediaStreamPowerLoggerTest, LogMessagesDoNotContainPointers) {
+  MediaStreamPowerLogger logger;
+  logger.OnSuspend();
+  logger.OnResume();
+  logger.OnThermalStateChange(
+      base::PowerThermalObserver::DeviceThermalState::kNominal);
+  logger.OnSpeedLimitChange(50);
+  ASSERT_TRUE(base::test::RunUntil([&]() { return messages_.size() == 4; }));
+
+  EXPECT_THAT(messages_, Contains(HasSubstr("MSPL::OnSuspend([id=")));
+  EXPECT_THAT(messages_, Contains(HasSubstr("MSPL::OnResume([id=")));
+  EXPECT_THAT(messages_,
+              Contains(HasSubstr("MSPL::OnThermalStateChange({id=")));
+  EXPECT_THAT(messages_, Contains(HasSubstr("MSPL::OnSpeedLimitChange({id=")));
+  EXPECT_THAT(messages_, Each(Not(HasSubstr("0x"))));
+}
+
+}  // namespace
+}  // namespace content
diff --git a/content/test/BUILD.gn b/content/test/BUILD.gn
index 3c13273..c5596ac 100644
--- a/content/test/BUILD.gn
+++ b/content/test/BUILD.gn
@@ -2868,6 +2868,7 @@
     "../browser/renderer_host/media/media_devices_manager_unittest.cc",
     "../browser/renderer_host/media/media_stream_dispatcher_host_unittest.cc",
     "../browser/renderer_host/media/media_stream_manager_unittest.cc",
+    "../browser/renderer_host/media/media_stream_power_logger_unittest.cc",
     "../browser/renderer_host/media/media_stream_ui_proxy_unittest.cc",
     "../browser/renderer_host/media/mock_preferred_audio_output_device_manager.cc",
     "../browser/renderer_host/media/mock_preferred_audio_output_device_manager.h",