Making OutputSurface a begin frame source and vsync source.

cc/output/managed_memory_policy.h

Index: cc/output/managed_memory_policy.h
diff --git a/cc/output/managed_memory_policy.h b/cc/output/managed_memory_policy.h
index ad0224b6c42ca4f55dba72e9b2ea166fb767162b..830c43be120a5fe0d6c0c9562b869f8a4e8ec419 100644
--- a/cc/output/managed_memory_policy.h
+++ b/cc/output/managed_memory_policy.h
@@ -6,6 +6,7 @@
 #define CC_OUTPUT_MANAGED_MEMORY_POLICY_H_
 
 #include "base/basictypes.h"
+#include "base/debug/trace_event_argument.h"
 #include "cc/base/cc_export.h"
 #include "cc/resources/tile_priority.h"
 #include "gpu/command_buffer/common/gpu_memory_allocation.h"
@@ -33,6 +34,8 @@ struct CC_EXPORT ManagedMemoryPolicy {
       gpu::MemoryAllocation::PriorityCutoff priority_cutoff);
   static TileMemoryLimitPolicy PriorityCutoffToTileMemoryLimitPolicy(
       gpu::MemoryAllocation::PriorityCutoff priority_cutoff);
+
+  void AsValueInto(base::debug::TracedValue* dict) const;
 };
 
 }  // namespace cc