Add a new API in WebMediaPlayer to do a GPU-GPU textures copy if possible

webkit/media/webmediaplayer_impl.cc

Index: webkit/media/webmediaplayer_impl.cc
diff --git a/webkit/media/webmediaplayer_impl.cc b/webkit/media/webmediaplayer_impl.cc
index 804135b658bcfefad732d60d2c56c35e0580e914..25844ffab61ec76030770e8762f6638ae99d2972 100644
--- a/webkit/media/webmediaplayer_impl.cc
+++ b/webkit/media/webmediaplayer_impl.cc
@@ -25,6 +25,7 @@
 #include "media/filters/audio_renderer_impl.h"
 #include "media/filters/chunk_demuxer.h"
 #include "media/filters/video_renderer_base.h"
+#include "third_party/khronos/GLES2/gl2.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebRect.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebSize.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebString.h"
@@ -670,6 +671,27 @@ void WebMediaPlayerImpl::putCurrentFrame(
   delete web_video_frame;
 }
 
+bool WebMediaPlayerImpl::copyVideoTextureToPlatformTexture(
+    WebKit::WebGraphicsContext3D* webGraphicsContext,

[scherkus (not reviewing), 2013/03/08 20:17:37]

web_graphics_context

+    unsigned int texture,
+    unsigned int level,
+    unsigned int internalFormat) {

[scherkus (not reviewing), 2013/03/08 20:17:37]

internal_format

+  scoped_refptr<media::VideoFrame> video_frame;
+  {
+    base::AutoLock auto_lock(lock_);
+    video_frame = current_frame_;
+  }
+  if (video_frame

[scherkus (not reviewing), 2013/03/08 20:17:37]

chromium puts && at the end of lines

+      && video_frame->format() == media::VideoFrame::NATIVE_TEXTURE
+      && video_frame->texture_target() == GL_TEXTURE_2D) {
+    uint32 sourceTexture = video_frame->texture_id();

[scherkus (not reviewing), 2013/03/08 20:17:37]

source_texture

+    webGraphicsContext->copyTextureCHROMIUM(GL_TEXTURE_2D,
+        sourceTexture, texture, level, internalFormat);
+    return true;
+  }
+  return false;
+}
+
 // Helper enum for reporting generateKeyRequest/addKey histograms.
 enum MediaKeyException {
   kUnknownResultId,