gpu: Compositor management of GpuMemoryBuffer instances.

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 3c8612d472c4fa558edef5c32c3eb52b6724c131..3653c960b5f5ca1f75a6cede82d73bdf25a52c3f 100644
--- a/base/threading/thread_restrictions.h
+++ b/base/threading/thread_restrictions.h
@@ -41,6 +41,7 @@ class Predictor;
 }
 namespace content {
 class BrowserGpuChannelHostFactory;
+class BrowserGpuMemoryBufferManager;
 class BrowserShutdownProfileDumper;
 class BrowserTestBase;
 class GLHelper;
@@ -213,6 +214,8 @@ class BASE_EXPORT ThreadRestrictions {
   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