Implement RenderWidgetHostViewBase::ImeCancelComposition for all Views (Aura Only)

content/browser/renderer_host/text_input_manager.h

 // Copyright 2016 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_TEXT_INPUT_MANAGER_H__
 #define CONTENT_BROWSER_RENDERER_HOST_TEXT_INPUT_MANAGER_H__
 
 #include <unordered_map>
 
 #include "base/observer_list.h"
@@ skipping 18 matching lines @@
   class CONTENT_EXPORT Observer {
    public:
     // Called when a view has called UpdateTextInputState on TextInputManager.
     // If the call has led to a change in TextInputState, |did_update_state| is
     // true. In some plaforms, we need this update even when the state has not
     // changed (e.g., Aura for updating IME).
     virtual void OnUpdateTextInputStateCalled(
         TextInputManager* text_input_manager,
         RenderWidgetHostViewBase* updated_view,
         bool did_update_state) {}
+    // Called when |updated_view| has called ImeCancelComposition on
+    // TextInputManager.
+    virtual void OnImeCancelComposition(
+        TextInputManager* text_input_manager,
+        RenderWidgetHostViewBase* updated_view) {}
   };
 
   TextInputManager();
   ~TextInputManager();
 
   // ---------------------------------------------------------------------------
   // The following methods can be used to obtain information about IME-related
   // state for the active RenderWidget.
 
   // Returns the currently active widget, i.e., the RWH which is associated with
   // |active_view_|.
   RenderWidgetHostImpl* GetActiveWidget() const;
 
   // Returns the TextInputState corresponding to |active_view_|.
   // Users of this method should not hold on to the pointer as it might become
   // dangling if the TextInputManager or |active_view_| might go away.
   const TextInputState* GetTextInputState();
 
   // ---------------------------------------------------------------------------
   // The following methods are called by RWHVs on the tab to update their IME-
   // related state.
 
   // Updates the TextInputState for |view|.
   void UpdateTextInputState(RenderWidgetHostViewBase* view,
                             const TextInputState& state);
 
+  // The current IME composition has been cancelled on the renderer side for
+  // the widget corresponding to |view|.
+  void ImeCancelComposition(RenderWidgetHostViewBase* view);
+
   // Registers the given |view| for tracking its TextInputState. This is called
   // by any view which has updates in its TextInputState (whether tab's RWHV or
   // that of a child frame). The |view| must unregister itself before being
   // destroyed (i.e., call TextInputManager::Unregister).
   void Register(RenderWidgetHostViewBase* view);
 
   // Clears the TextInputState from the |view|. If |view == active_view_|, this
   // call will lead to a TextInputState update since the TextInputState.type
   // should be reset to none.
   void Unregister(RenderWidgetHostViewBase* view);
@@ skipping 28 matching lines @@
   std::unordered_map<RenderWidgetHostViewBase*, TextInputState>
       text_input_state_map_;
 
   base::ObserverList<Observer> observer_list_;
 
   DISALLOW_COPY_AND_ASSIGN(TextInputManager);
 };
 }
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_TEXT_INPUT_MANAGER_H__