[Athena: Cleanup] consolidate ChromeAppActivity and ShellAppActivity

athena/content/app_activity_unittest.cc

Index: athena/content/app_activity_unittest.cc
diff --git a/athena/content/app_activity_unittest.cc b/athena/content/app_activity_unittest.cc
index f4c77e607765c03832e2a59dbecea5755d0200b8..0de0e1a517c14dcb80e92c5bafec047a7d283ad3 100644
--- a/athena/content/app_activity_unittest.cc
+++ b/athena/content/app_activity_unittest.cc
@@ -69,9 +69,6 @@ class TestAppActivity : public AppActivity {
     return view_->GetWidget()->GetNativeWindow();
   }
 
-  // AppActivity:
-  virtual views::WebView* GetWebView() OVERRIDE { return NULL; }
-
   // ActivityViewModel:
   virtual void Init() OVERRIDE {}
   virtual SkColor GetRepresentativeColor() const OVERRIDE { return 0; }