Move InsertSyncPoint to GLES2Interface

ppapi/proxy/ppb_graphics_3d_proxy.h

Index: ppapi/proxy/ppb_graphics_3d_proxy.h
diff --git a/ppapi/proxy/ppb_graphics_3d_proxy.h b/ppapi/proxy/ppb_graphics_3d_proxy.h
index 493c489d26b4fedede4c4495adbceb97fa1607a5..f07d2c4cb43f6b30ad8fc6d04fb091e4d9d1612e 100644
--- a/ppapi/proxy/ppb_graphics_3d_proxy.h
+++ b/ppapi/proxy/ppb_graphics_3d_proxy.h
@@ -46,6 +46,7 @@ class Graphics3D : public PPB_Graphics3D_Shared {
   virtual PP_Graphics3DTrustedState FlushSyncFast(
       int32_t put_offset,
       int32_t last_known_get) OVERRIDE;
+  virtual uint32_t InsertSyncPoint() OVERRIDE;
 
  private:
   class LockingCommandBuffer;
@@ -105,6 +106,7 @@ class PPB_Graphics3D_Proxy : public InterfaceProxy {
                               int32 id,
                               ppapi::proxy::SerializedHandle* transfer_buffer);
   void OnMsgSwapBuffers(const HostResource& context);
+  void OnMsgInsertSyncPoint(const HostResource& context, uint32* sync_point);
   // Renderer->plugin message handlers.
   void OnMsgSwapBuffersACK(const HostResource& context,
                            int32_t pp_error);