updating Input field value by script should reset IME composition.

content/renderer/render_view_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_RENDERER_RENDER_VIEW_IMPL_H_
 #define CONTENT_RENDERER_RENDER_VIEW_IMPL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 278 matching lines @@
                              const blink::WebWindowFeatures& features,
                              const blink::WebString& frame_name,
                              blink::WebNavigationPolicy policy,
                              bool suppress_opener) override;
   blink::WebWidget* CreatePopupMenu(blink::WebPopupType popup_type) override;
   blink::WebStorageNamespace* CreateSessionStorageNamespace() override;
   void PrintPage(blink::WebLocalFrame* frame) override;
   bool EnumerateChosenDirectory(
       const blink::WebString& path,
       blink::WebFileChooserCompletion* chooser_completion) override;
+  void DidCancelCompositionOnSelectionChange() override;
   void SetValidationMessageDirection(base::string16* main_text,
                                      blink::WebTextDirection main_text_hint,
                                      base::string16* sub_text,
                                      blink::WebTextDirection sub_text_hint);
   void ShowValidationMessage(const blink::WebRect& anchor_in_viewport,
                              const blink::WebString& main_text,
                              blink::WebTextDirection main_text_hint,
                              const blink::WebString& sub_text,
                              blink::WebTextDirection hint) override;
   void HideValidationMessage() override;
@@ skipping 514 matching lines @@
   // ---------------------------------------------------------------------------
 
   base::WeakPtrFactory<RenderViewImpl> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderViewImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDER_VIEW_IMPL_H_