Make activities have a thick border when in overview mode part 1

athena/content/app_activity.cc

Index: athena/content/app_activity.cc
diff --git a/athena/content/app_activity.cc b/athena/content/app_activity.cc
index 62ecb2cf859ab326e85c897d97ba4b4aab4bf78a..5494f82ed20a218608ac445b3ae76cd701f42a5a 100644
--- a/athena/content/app_activity.cc
+++ b/athena/content/app_activity.cc
@@ -138,6 +138,17 @@ gfx::ImageSkia AppActivity::GetOverviewModeImage() {
   return overview_mode_image_;
 }
 
+void AppActivity::PrepareContentsForOverview() {
+  // Turn on fast resizing to avoid re-laying out the web contents when
+  // entering / exiting overview mode.
+  web_view_->SetFastResize(true);
+}
+
+void AppActivity::ResetContentsView() {
+  web_view_->SetFastResize(false);
+  web_view_->Layout();
+}
+
 void AppActivity::TitleWasSet(content::NavigationEntry* entry,
                               bool explicit_set) {
   ActivityManager::Get()->UpdateActivity(this);