Remove candidate show/hide/update related code

content/browser/renderer_host/render_widget_host_impl.h

Index: content/browser/renderer_host/render_widget_host_impl.h
diff --git a/content/browser/renderer_host/render_widget_host_impl.h b/content/browser/renderer_host/render_widget_host_impl.h
index 4e89686898e6a92a36234f6254679308e355a3e8..b9fc03ab48175190463c2ecca4f034f6a3db7d14 100644
--- a/content/browser/renderer_host/render_widget_host_impl.h
+++ b/content/browser/renderer_host/render_widget_host_impl.h
@@ -310,11 +310,6 @@ class CONTENT_EXPORT RenderWidgetHostImpl
   // display input method windows under the cursor.)
   void SetInputMethodActive(bool activate);
 
-  // Notifies the renderer changes of IME candidate window state.
-  void CandidateWindowShown();
-  void CandidateWindowUpdated();
-  void CandidateWindowHidden();
-
   // Update the composition node of the renderer (or WebKit).
   // WebKit has a special node (a composition node) for input method to change
   // its text without affecting any other DOM nodes. When the input method