Remove FORMAT_RGB from gfx::PngCodec

media/gpu/rendering_helper.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef MEDIA_GPU_RENDERING_HELPER_H_
 #define MEDIA_GPU_RENDERING_HELPER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 121 matching lines @@
 
   // Delete |texture_id|.
   void DeleteTexture(uint32_t texture_id);
 
   // Get the platform specific handle to the OpenGL display.
   void* GetGLDisplay();
 
   // Get the GL context.
   gl::GLContext* GetGLContext();
 
-  // Get rendered thumbnails as RGB.
-  // Sets alpha_solid to true if the alpha channel is entirely 0xff.
-  void GetThumbnailsAsRGB(std::vector<unsigned char>* rgb,
-                          bool* alpha_solid,
-                          base::WaitableEvent* done);
+  // Get rendered thumbnails as RGBA.
+  void GetThumbnailsAsRGBA(std::vector<unsigned char>* rgba,
+                           base::WaitableEvent* done);
 
  private:
   struct RenderedVideo {
     // The rect on the screen where the video will be rendered.
     gfx::Rect render_area;
 
     // True if there won't be any new video frames comming.
     bool is_flushing;
 
     // The number of frames need to be dropped to catch up the rendering. We
@@ skipping 65 matching lines @@
   base::CancelableClosure render_task_;
   base::TimeTicks vsync_timebase_;
   base::TimeDelta vsync_interval_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderingHelper);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_GPU_RENDERING_HELPER_H_