Remove the 2-level input method system & InputMethodBridge.

ui/base/ime/mock_input_method.h

Index: ui/base/ime/mock_input_method.h
diff --git a/ui/base/ime/mock_input_method.h b/ui/base/ime/mock_input_method.h
index 305a80f8e108fcc2ef4395b12881186b47face4d..d91757caf3293927984809858e0c5f5e7beeb188 100644
--- a/ui/base/ime/mock_input_method.h
+++ b/ui/base/ime/mock_input_method.h
@@ -57,6 +57,7 @@ class UI_BASE_IME_EXPORT MockInputMethod
  private:
   TextInputClient* text_input_client_;
   base::ObserverList<InputMethodObserver> observer_list_;
+  internal::InputMethodDelegate* delegate_;

[yukawa, 2015/06/11 21:48:42]

Can we split changes in mock_input_method.{h, cc} into a separate CL?

[Shu Chen, 2015/06/12 03:34:38]

I recall this is to fix some test failures. MockInputMethod::DispatchKeyEvent
mutes all key events, which is wrong. Instead, it should release key events by
calling DispatchKeyEventPostIME.

[yukawa, 2015/06/12 05:20:45]

Would it be possible to commit changes in mock_input_method.{h, cc} before this
CL?  I'd like to keep the size of this CL as small as possible.

[Shu Chen, 2015/06/12 05:32:54]

No problem. I've reverted the changes for MockInputMethod in this cl. 
And I will create another cl for it soon.

 
   DISALLOW_COPY_AND_ASSIGN(MockInputMethod);
 };