Optimize webgl texImage2D from YUV video textures.

media/renderers/skcanvas_video_renderer.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_RENDERERS_SKCANVAS_VIDEO_RENDERER_H_
 #define MEDIA_RENDERERS_SKCANVAS_VIDEO_RENDERER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 48 matching lines @@
             SkCanvas* canvas,
             const Context3D& context_3d);
 
   // Convert the contents of |video_frame| to raw RGB pixels. |rgb_pixels|
   // should point into a buffer large enough to hold as many 32 bit RGBA pixels
   // as are in the visible_rect() area of the frame.
   static void ConvertVideoFrameToRGBPixels(const media::VideoFrame* video_frame,
                                            void* rgb_pixels,
                                            size_t row_bytes);
 
-  // Copy the contents of texture of |video_frame| to texture |texture|.
+  // Copy the contents of texture of |video_frame| to texture |texture| in
+  // context |destination_gl|.
   // |level|, |internal_format|, |type| specify target texture |texture|.
   // The format of |video_frame| must be VideoFrame::NATIVE_TEXTURE.
-  static void CopyVideoFrameSingleTextureToGLTexture(
-      gpu::gles2::GLES2Interface* gl,
+  // |context_3d| has a GrContext that may be used during the copy.
+  // Returns true on success.
+  static bool CopyVideoFrameTexturesToGLTexture(
+      const Context3D& context_3d,
+      gpu::gles2::GLES2Interface* destination_gl,
       VideoFrame* video_frame,
       unsigned int texture,
       unsigned int internal_format,
       unsigned int type,
       bool premultiply_alpha,
       bool flip_y);
 
   // In general, We hold the most recently painted frame to increase the
   // performance for the case that the same frame needs to be painted
   // repeatedly. Call this function if you are sure the most recent frame will
@@ skipping 10 matching lines @@
 
   // Used for DCHECKs to ensure method calls executed in the correct thread.
   base::ThreadChecker thread_checker_;
 
   DISALLOW_COPY_AND_ASSIGN(SkCanvasVideoRenderer);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_RENDERERS_SKCANVAS_VIDEO_RENDERER_H_