Tab Capture: Backing store readbacks to YV12 VideoFrames.

content/browser/renderer_host/render_widget_host_view_mac.mm

 // 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.
 
 #include "content/browser/renderer_host/render_widget_host_view_mac.h"
 
 #include <QuartzCore/QuartzCore.h>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 948 matching lines @@
 
   gfx::Rect src_pixel_gl_subrect = gfx::ToEnclosingRect(
       gfx::ScaleRect(src_gl_subrect, scale));
   compositing_iosurface_->CopyTo(
       src_pixel_gl_subrect,
       dst_pixel_size,
       output,
       callback);
 }
 
+void RenderWidgetHostViewMac::CopyFromCompositingSurfaceToVideoFrame(
+      const gfx::Rect& src_subrect,
+      const scoped_refptr<media::VideoFrame>& target,
+      const base::Callback<void(bool)>& callback) {
+  NOTIMPLEMENTED();
+  callback.Run(false);
+}
+
+bool RenderWidgetHostViewMac::CanCopyToVideoFrame() const {
+  return false;
+}
+
 // Sets whether or not to accept first responder status.
 void RenderWidgetHostViewMac::SetTakesFocusOnlyOnMouseDown(bool flag) {
   [cocoa_view_ setTakesFocusOnlyOnMouseDown:flag];
 }
 
 void RenderWidgetHostViewMac::ForwardMouseEvent(const WebMouseEvent& event) {
   if (render_widget_host_)
     render_widget_host_->ForwardMouseEvent(event);
 
   if (event.type == WebInputEvent::MouseLeave) {
@@ skipping 2443 matching lines @@
   if (!string) return NO;
 
   // If the user is currently using an IME, confirm the IME input,
   // and then insert the text from the service, the same as TextEdit and Safari.
   [self confirmComposition];
   [self insertText:string];
   return YES;
 }
 
 @end