Remove the 2-level input method system & InputMethodBridge.

content/browser/renderer_host/render_widget_host_view_aura.h

Index: content/browser/renderer_host/render_widget_host_view_aura.h
diff --git a/content/browser/renderer_host/render_widget_host_view_aura.h b/content/browser/renderer_host/render_widget_host_view_aura.h
index 8d07b0dc98afceea66d55ad18f33f22c4801cf14..e335fca13d0fbb92c02bbf7bb34585ff81569e30 100644
--- a/content/browser/renderer_host/render_widget_host_view_aura.h
+++ b/content/browser/renderer_host/render_widget_host_view_aura.h
@@ -240,7 +240,6 @@ class CONTENT_EXPORT RenderWidgetHostViewAura
   void ClearCompositionText() override;
   void InsertText(const base::string16& text) override;
   void InsertChar(base::char16 ch, int flags) override;
-  gfx::NativeWindow GetAttachedWindow() const override;
   ui::TextInputType GetTextInputType() const override;
   ui::TextInputMode GetTextInputMode() const override;
   int GetTextInputFlags() const override;
@@ -353,12 +352,12 @@ class CONTENT_EXPORT RenderWidgetHostViewAura
   // Called when the context menu is about to be displayed.
   void OnShowContextMenu();
 
- protected:
-  ~RenderWidgetHostViewAura() override;
-
   // Exposed for tests.
   aura::Window* window() { return window_; }
 
+ protected:
+  ~RenderWidgetHostViewAura() override;
+
   DelegatedFrameHost* GetDelegatedFrameHost() const {
     return delegated_frame_host_.get();
   }