Implemented new fence syncs which replaces the old sync points.

components/mus/gles2/command_buffer_local.h

Index: components/mus/gles2/command_buffer_local.h
diff --git a/components/mus/gles2/command_buffer_local.h b/components/mus/gles2/command_buffer_local.h
index 92a7966110f12220cdb2911b84309feaab675a5d..31da8dd5b80b3b45e7e98f27069700c13e873e37 100644
--- a/components/mus/gles2/command_buffer_local.h
+++ b/components/mus/gles2/command_buffer_local.h
@@ -73,6 +73,9 @@ class CommandBufferLocal : public gpu::GpuControl {
   bool IsGpuChannelLost() override;
   gpu::CommandBufferNamespace GetNamespaceID() const override;
   uint64_t GetCommandBufferID() const override;
+  uint32_t GenerateFenceSyncRelease() override;
+  bool IsFenceSyncRelease(uint32_t release) override;
+  bool IsFenceSyncFlushed(uint32_t release) override;
 
  private:
   void PumpCommands();
@@ -94,6 +97,8 @@ class CommandBufferLocal : public gpu::GpuControl {
   scoped_refptr<gfx::GLSurface> surface_;
   CommandBufferLocalClient* client_;
 
+  uint32_t next_fence_sync_release_;
+
   base::WeakPtrFactory<CommandBufferLocal> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(CommandBufferLocal);