Move InsertSyncPoint to GLES2Interface

content/common/gpu/client/command_buffer_proxy_impl.h

Index: content/common/gpu/client/command_buffer_proxy_impl.h
diff --git a/content/common/gpu/client/command_buffer_proxy_impl.h b/content/common/gpu/client/command_buffer_proxy_impl.h
index ff50fcfa73658f2ccb62a86f67ebcb05239bdcab..95f3c60eb1dd6f5d341174254006af4f3be2bae5 100644
--- a/content/common/gpu/client/command_buffer_proxy_impl.h
+++ b/content/common/gpu/client/command_buffer_proxy_impl.h
@@ -87,6 +87,7 @@ class CommandBufferProxyImpl
   virtual void SetParseError(gpu::error::Error error) OVERRIDE;
   virtual void SetContextLostReason(
       gpu::error::ContextLostReason reason) OVERRIDE;
+  virtual uint32 InsertSyncPoint() OVERRIDE;
 
   void SetMemoryAllocationChangedCallback(
       const base::Callback<void(const GpuMemoryAllocationForRenderer&)>&
@@ -95,12 +96,6 @@ class CommandBufferProxyImpl
   bool DiscardBackbuffer();
   bool EnsureBackbuffer();
 
-  // Inserts a sync point, returning its ID. This is handled on the IO thread of
-  // the GPU process, and so should be relatively fast, but its effect is
-  // ordered wrt other messages (in particular, Flush). Sync point IDs are
-  // global and can be used for cross-channel synchronization.
-  uint32 InsertSyncPoint();
-
   // Makes this command buffer invoke a task when a sync point is reached, or
   // the command buffer that inserted that sync point is destroyed.
   bool SignalSyncPoint(uint32 sync_point,