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

athena/content/app_activity_proxy.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_proxy.h"
 
 #include "athena/content/app_activity_registry.h"
 #include "ui/aura/window.h"
 #include "ui/views/view.h"
 #include "ui/views/widget/widget.h"
@@ skipping 56 matching lines @@
 }
 
 SkColor AppActivityProxy::GetRepresentativeColor() const {
   return color_;
 }
 
 base::string16 AppActivityProxy::GetTitle() const {
   return title_;
 }
 
+gfx::ImageSkia AppActivityProxy::GetIcon() const {
+  return gfx::ImageSkia();
+}
+
 bool AppActivityProxy::UsesFrame() const {
   return true;
 }
 
 views::View* AppActivityProxy::GetContentsView() {
   return view_;
 }
 
 void AppActivityProxy::CreateOverviewModeImage() {
   // Nothing we can do here.
 }
 
 gfx::ImageSkia AppActivityProxy::GetOverviewModeImage() {
   return image_;
 }
 
 void AppActivityProxy::PrepareContentsForOverview() {
 }
 
 void AppActivityProxy::ResetContentsView() {
 }
 
 }  // namespace athena