[Athena] Hack to display favicons for web activities in overview mode

athena/content/app_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/app_activity.h"
 
 #include "athena/activity/public/activity_manager.h"
 #include "athena/content/app_activity_registry.h"
 #include "athena/content/public/app_registry.h"
 #include "content/public/browser/web_contents.h"
@@ skipping 89 matching lines @@
 
 SkColor AppActivity::GetRepresentativeColor() const {
   // TODO(sad): Compute the color from the favicon.
   return SK_ColorGRAY;
 }
 
 base::string16 AppActivity::GetTitle() const {
   return web_view_->GetWebContents()->GetTitle();
 }
 
+gfx::ImageSkia AppActivity::GetIcon() const {
+  return gfx::ImageSkia();
+}
+
 bool AppActivity::UsesFrame() const {
   return false;
 }
 
 views::View* AppActivity::GetContentsView() {
   if (!web_view_) {
     // TODO(oshima): use apps::NativeAppWindowViews
     content::WebContents* web_contents = GetWebContents();
     web_view_ = new views::WebView(web_contents->GetBrowserContext());
     web_view_->SetWebContents(web_contents);
@@ skipping 89 matching lines @@
     overview_mode_image_ = gfx::ImageSkia();
   }
   // Now we can hide this.
   // Note: This might have to be done asynchronously after the readback took
   // place.
   web_view_->SetVisible(false);
   web_view_->GetWebContents()->GetNativeView()->Hide();
 }
 
 }  // namespace athena