Let Chrome app handle Ash accelerators first if the app is launched as a window

ash/test/test_shell_delegate.h

Index: ash/test/test_shell_delegate.h
diff --git a/ash/test/test_shell_delegate.h b/ash/test/test_shell_delegate.h
index 1788a4a91800d073f58b237d6a5315cbbd5efe1d..db9ee4498997622bb8460be01935f3e179293404 100644
--- a/ash/test/test_shell_delegate.h
+++ b/ash/test/test_shell_delegate.h
@@ -25,6 +25,7 @@ class TestShellDelegate : public ShellDelegate {
   virtual void Shutdown() OVERRIDE;
   virtual void Exit() OVERRIDE;
   virtual void NewWindow(bool incognito) OVERRIDE;
+  virtual bool IsBrowserWindow(const aura::Window* window) OVERRIDE;
   virtual void Search() OVERRIDE;
   virtual void OpenFileManager() OVERRIDE;
   virtual void OpenCrosh() OVERRIDE;