[FYI] All-in-one OnCandidateWindow{Show,Update,Hide}

content/browser/renderer_host/render_widget_host_impl.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_IMPL_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_IMPL_H_
 
 #include <deque>
 #include <list>
 #include <map>
@@ skipping 294 matching lines @@
   virtual void OnPointerEventActivate();
 
   // Notifies the renderer whether or not the input method attached to this
   // process is activated.
   // When the input method is activated, a renderer process sends IPC messages
   // to notify the status of its composition node. (This message is mainly used
   // for notifying the position of the input cursor so that the browser can
   // display input method windows under the cursor.)
   void SetInputMethodActive(bool activate);
 
+  // Notifies the renderer changes of IME candidate window state.
+  void CandidateWindowShow();
+  void CandidateWindowUpdate();
+  void CandidateWindowHide();
+
   // 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
   // (attached to the browser) updates its text, the browser sends IPC messages
   // to update the composition node of the renderer.
   // (Read the comments of each function for its detail.)
 
   // Sets the text of the composition node.
   // This function can also update the cursor position and mark the specified
   // range in the composition node.
@@ skipping 595 matching lines @@
   int64 last_input_number_;
 
   BrowserRenderingStats rendering_stats_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_IMPL_H_