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..75c7bc47da9707a11a9e28e297e55c3df61c4025 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;
+  uint64_t GenerateFenceSyncRelease() override;
+  bool IsFenceSyncRelease(uint64_t release) override;
+  bool IsFenceSyncFlushed(uint64_t release) override;
 
  private:
   void PumpCommands();
@@ -81,6 +84,10 @@ class CommandBufferLocal : public gpu::GpuControl {
   void OnUpdateVSyncParameters(const base::TimeTicks timebase,
                                const base::TimeDelta interval);
   bool OnWaitSyncPoint(uint32_t sync_point);
+  void OnFenceSyncRelease(uint64_t release);
+  bool OnWaitFenceSync(gpu::CommandBufferNamespace namespace_id,
+                       uint64_t command_buffer_id,
+                       uint64_t release);
   void OnParseError();
   void OnContextLost(uint32_t reason);
   void OnSyncPointRetired();
@@ -94,6 +101,8 @@ class CommandBufferLocal : public gpu::GpuControl {
   scoped_refptr<gfx::GLSurface> surface_;
   CommandBufferLocalClient* client_;
 
+  uint64_t next_fence_sync_release_;
+
   base::WeakPtrFactory<CommandBufferLocal> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(CommandBufferLocal);