Remove some friend declarations in ThreadRestrictions that are no more needed.

base/threading/thread_restrictions.h

Index: base/threading/thread_restrictions.h
diff --git a/base/threading/thread_restrictions.h b/base/threading/thread_restrictions.h
index 3653c960b5f5ca1f75a6cede82d73bdf25a52c3f..39f32a7bfdec34a955c22b1e3823c8948a0b4e24 100644
--- a/base/threading/thread_restrictions.h
+++ b/base/threading/thread_restrictions.h
@@ -15,22 +15,16 @@
 #define ENABLE_THREAD_RESTRICTIONS 0
 #endif
 
-class AcceleratedPresenter;
 class BrowserProcessImpl;
 class HistogramSynchronizer;
 class NativeBackendKWallet;
 class ScopedAllowWaitForLegacyWebViewApi;
 class TestingAutomationProvider;
 
-namespace browser_sync {
-class NonFrontendDataTypeController;
-class UIModelWorker;
-}
 namespace cc {
 class CompletionEvent;
 }
 namespace chromeos {
-class AudioMixerAlsa;
 class BlockingMethodCaller;
 namespace system {
 class StatisticsProviderImpl;
@@ -44,7 +38,6 @@ class BrowserGpuChannelHostFactory;
 class BrowserGpuMemoryBufferManager;
 class BrowserShutdownProfileDumper;
 class BrowserTestBase;
-class GLHelper;
 class GpuChannelHost;
 class NestedMessagePumpAndroid;
 class RenderWidgetResizeHelper;
@@ -58,20 +51,12 @@ namespace disk_cache {
 class BackendImpl;
 class InFlightIO;
 }
-namespace media {
-class AudioOutputController;
-}
-namespace metrics {
-class MetricsService;
-}
 namespace mojo {
 namespace common {
 class WatcherThreadManager;
 }
 }
 namespace net {
-class FileStreamPosix;
-class FileStreamWin;
 namespace internal {
 class AddressTrackerLinux;
 }
@@ -206,29 +191,20 @@ class BASE_EXPORT ThreadRestrictions {
 
   // END ALLOWED USAGE.
   // BEGIN USAGE THAT NEEDS TO BE FIXED.
-  friend class ::chromeos::AudioMixerAlsa;        // http://crbug.com/125206
   friend class ::chromeos::BlockingMethodCaller;  // http://crbug.com/125360
   friend class ::chromeos::system::StatisticsProviderImpl;  // http://crbug.com/125385
-  friend class browser_sync::NonFrontendDataTypeController;  // http://crbug.com/19757
-  friend class browser_sync::UIModelWorker;       // http://crbug.com/19757
   friend class chrome_browser_net::Predictor;     // http://crbug.com/78451
   friend class
       content::BrowserGpuChannelHostFactory;      // http://crbug.com/125248
   friend class
       content::BrowserGpuMemoryBufferManager;     // http://crbug.com/420368
-  friend class content::GLHelper;                 // http://crbug.com/125415
   friend class content::GpuChannelHost;           // http://crbug.com/125264
   friend class content::TextInputClientMac;       // http://crbug.com/121917
   friend class dbus::Bus;                         // http://crbug.com/125222
   friend class disk_cache::BackendImpl;           // http://crbug.com/74623
   friend class disk_cache::InFlightIO;            // http://crbug.com/74623
-  friend class media::AudioOutputController;      // http://crbug.com/120973
-  friend class net::FileStreamPosix;              // http://crbug.com/115067
-  friend class net::FileStreamWin;                // http://crbug.com/115067
   friend class net::internal::AddressTrackerLinux;  // http://crbug.com/125097
-  friend class ::AcceleratedPresenter;            // http://crbug.com/125391
   friend class ::BrowserProcessImpl;              // http://crbug.com/125207
-  friend class metrics::MetricsService;           // http://crbug.com/124954
   friend class ::NativeBackendKWallet;            // http://crbug.com/125331
   // END USAGE THAT NEEDS TO BE FIXED.