Android media: VideoFrame should not store so many sync points.

cc/output/context_provider.h

Index: cc/output/context_provider.h
diff --git a/cc/output/context_provider.h b/cc/output/context_provider.h
index 7362e8b55aa9acffd62060af1ed08c766581c4f2..03a7ab63577d7d7c37cfecc1b5edafe302cab34c 100644
--- a/cc/output/context_provider.h
+++ b/cc/output/context_provider.h
@@ -7,6 +7,7 @@
 
 #include "base/callback.h"
 #include "base/memory/ref_counted.h"
+#include "base/memory/weak_ptr.h"
 #include "cc/base/cc_export.h"
 #include "gpu/command_buffer/common/capabilities.h"
 
@@ -20,7 +21,8 @@ namespace gles2 { class GLES2Interface; }
 namespace cc {
 struct ManagedMemoryPolicy;
 
-class ContextProvider : public base::RefCountedThreadSafe<ContextProvider> {
+class ContextProvider : public base::RefCountedThreadSafe<ContextProvider>,
+                        public base::SupportsWeakPtr<ContextProvider> {
  public:
   // Bind the 3d context to the current thread. This should be called before
   // accessing the contexts. Calling it more than once should have no effect.