GLES2CmdDecoder should resize GLSurface using GLSurface::Resize

content/common/gpu/image_transport_surface.h

Index: content/common/gpu/image_transport_surface.h
diff --git a/content/common/gpu/image_transport_surface.h b/content/common/gpu/image_transport_surface.h
index 263f833927ae9b235cbf881ec386ef97fd593d99..099aaa9784c9d5840e576003d3924c4c8e2cc83c 100644
--- a/content/common/gpu/image_transport_surface.h
+++ b/content/common/gpu/image_transport_surface.h
@@ -63,7 +63,6 @@ class ImageTransportSurface {
   virtual void OnBufferPresented(
       const AcceleratedSurfaceMsg_BufferPresented_Params& params) = 0;
 #endif
-  virtual void OnResize(gfx::Size size, float scale_factor) = 0;
   virtual void SetLatencyInfo(
       const std::vector<ui::LatencyInfo>& latency_info) = 0;
 
@@ -177,7 +176,6 @@ class PassThroughImageTransportSurface
   void OnBufferPresented(
       const AcceleratedSurfaceMsg_BufferPresented_Params& params) override;
 #endif
-  void OnResize(gfx::Size size, float scale_factor) override;
   gfx::Size GetSize() override;
   void SetLatencyInfo(
       const std::vector<ui::LatencyInfo>& latency_info) override;
@@ -193,6 +191,8 @@ class PassThroughImageTransportSurface
 
   ImageTransportHelper* GetHelper() { return helper_.get(); }
 
+  GpuChannelManager* manager_;
+
  private:
   scoped_ptr<ImageTransportHelper> helper_;
   bool did_set_swap_interval_;