Add RGB565 Texture readback support in gl_helper

content/browser/renderer_host/render_widget_host_view_android.h

Index: content/browser/renderer_host/render_widget_host_view_android.h
diff --git a/content/browser/renderer_host/render_widget_host_view_android.h b/content/browser/renderer_host/render_widget_host_view_android.h
index 107e5c6c0bcaf42b94df511fd6ff658e616f3743..7f83fd4f74c802de2f308f85d9552a9ab86b904c 100644
--- a/content/browser/renderer_host/render_widget_host_view_android.h
+++ b/content/browser/renderer_host/render_widget_host_view_android.h
@@ -137,7 +137,8 @@ class RenderWidgetHostViewAndroid
   virtual void CopyFromCompositingSurface(
       const gfx::Rect& src_subrect,
       const gfx::Size& dst_size,
-      const base::Callback<void(bool, const SkBitmap&)>& callback) OVERRIDE;
+      const base::Callback<void(bool, const SkBitmap&)>& callback,
+      bool readback_config_rgb565) OVERRIDE;
   virtual void CopyFromCompositingSurfaceToVideoFrame(
       const gfx::Rect& src_subrect,
       const scoped_refptr<media::VideoFrame>& target,
@@ -271,6 +272,7 @@ class RenderWidgetHostViewAndroid
   // of the copy.
   static void PrepareTextureCopyOutputResult(
       const gfx::Size& dst_size_in_pixel,
+      bool readback_config_rgb565,
       const base::Callback<void(bool, const SkBitmap&)>& callback,
       scoped_ptr<cc::CopyOutputResult> result);
   static void PrepareBitmapCopyOutputResult(