Converted Ppapi post swap buffer sync point to use sync tokens.

ppapi/shared_impl/ppb_graphics_3d_shared.h

Index: ppapi/shared_impl/ppb_graphics_3d_shared.h
diff --git a/ppapi/shared_impl/ppb_graphics_3d_shared.h b/ppapi/shared_impl/ppb_graphics_3d_shared.h
index 87ee9d6cb2a7c0355d2b914dcb6d7c30a0a136c9..3ee595eb0e248e4f0dbd4c7fc1efff93a9c76513 100644
--- a/ppapi/shared_impl/ppb_graphics_3d_shared.h
+++ b/ppapi/shared_impl/ppb_graphics_3d_shared.h
@@ -40,7 +40,8 @@ class PPAPI_SHARED_EXPORT PPB_Graphics3D_Shared
   int32_t SetAttribs(const int32_t attrib_list[]) override;
   int32_t GetError() override;
   int32_t ResizeBuffers(int32_t width, int32_t height) override;
-  int32_t SwapBuffers(scoped_refptr<TrackedCallback> callback) override;
+  int32_t SwapBuffers(scoped_refptr<TrackedCallback> callback,
+                      const gpu::SyncToken& sync_token) override;
   int32_t GetAttribMaxValue(int32_t attribute, int32_t* value) override;
 
   void* MapTexSubImage2DCHROMIUM(GLenum target,
@@ -67,7 +68,7 @@ class PPAPI_SHARED_EXPORT PPB_Graphics3D_Shared
 
   virtual gpu::CommandBuffer* GetCommandBuffer() = 0;
   virtual gpu::GpuControl* GetGpuControl() = 0;
-  virtual int32_t DoSwapBuffers() = 0;
+  virtual int32_t DoSwapBuffers(const gpu::SyncToken& sync_token) = 0;
 
   bool HasPendingSwap() const;
   bool CreateGLES2Impl(int32_t command_buffer_size,