Creating PNG images from web content to be used by OverviewMode navigation

athena/content/web_activity.cc

 // Copyright 2014 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 "athena/content/web_activity.h"
 
 #include "athena/activity/public/activity_factory.h"
 #include "athena/activity/public/activity_manager.h"
 #include "athena/content/content_proxy.h"
 #include "athena/content/public/dialogs.h"
@@ skipping 476 matching lines @@
       SetCurrentState(ACTIVITY_INVISIBLE);
     }
   }
   return web_view_;
 }
 
 views::Widget* WebActivity::CreateWidget() {
   return NULL;  // Use default widget.
 }
 
-gfx::ImageSkia WebActivity::GetOverviewModeImage() {
+scoped_ptr<gfx::Image> WebActivity::GetOverviewModeImage() {
   if (content_proxy_.get())
     content_proxy_->GetContentImage();
-  return gfx::ImageSkia();
+  return scoped_ptr<gfx::Image>(new gfx::Image());
 }
 
 void WebActivity::PrepareContentsForOverview() {
   // Turn on fast resizing to avoid re-laying out the web contents when
   // entering / exiting overview mode and the content is visible.
   if (!content_proxy_.get())
     web_view_->SetFastResize(true);
 }
 
 void WebActivity::ResetContentsView() {
@@ skipping 67 matching lines @@
 
 void WebActivity::ReloadAndObserve() {
   if (web_view_->IsContentEvicted()) {
     DCHECK_EQ(ACTIVITY_UNLOADED, current_state_);
     web_view_->ReloadContent();
   }
   Observe(web_view_->GetWebContents());
 }
 
 }  // namespace athena