Tab Capture: Backing store readbacks to YV12 VideoFrames.

content/browser/renderer_host/render_widget_host_view_gtk.cc

 // 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_gtk.h"
 
 // If this gets included after the gtk headers, then a bunch of compiler
 // errors happen because of a "#define Status int" in Xlib.h, which interacts
 // badly with net::URLRequestStatus::Status.
 #include "content/common/view_messages.h"
@@ skipping 1046 matching lines @@
   const size_t bitmap_size = bitmap.getSize();
   DCHECK_EQ(bitmap_size,
             static_cast<size_t>(image->height * image->bytes_per_line));
   unsigned char* pixels = static_cast<unsigned char*>(bitmap.getPixels());
   memcpy(pixels, image->data, bitmap_size);
 
   scoped_callback_runner.Release();
   callback.Run(true, bitmap);
 }
 
+void RenderWidgetHostViewGtk::CopyFromCompositingSurfaceToVideoFrame(
+      const gfx::Rect& src_subrect,
+      const scoped_refptr<media::VideoFrame>& target,
+      const base::Callback<void(bool)>& callback) {
+  NOTIMPLEMENTED();
+  callback.Run(false);
+}
+
+bool RenderWidgetHostViewGtk::CanCopyToVideoFrame() const {
+  return false;
+}
+
 void RenderWidgetHostViewGtk::AcceleratedSurfaceBuffersSwapped(
     const GpuHostMsg_AcceleratedSurfaceBuffersSwapped_Params& params,
     int gpu_host_id) {
    AcceleratedSurfaceMsg_BufferPresented_Params ack_params;
    ack_params.sync_point = 0;
    RenderWidgetHostImpl::AcknowledgeBufferPresent(
       params.route_id, gpu_host_id, ack_params);
 }
 
 void RenderWidgetHostViewGtk::AcceleratedSurfacePostSubBuffer(
@@ skipping 483 matching lines @@
             this));
   }
   BrowserAccessibilityGtk* root =
       browser_accessibility_manager_->GetRoot()->ToBrowserAccessibilityGtk();
 
   atk_object_set_role(root->GetAtkObject(), ATK_ROLE_HTML_CONTAINER);
   return root->GetAtkObject();
 }
 
 }  // namespace content