InputMethod should stop TextInputClient::InsertChar/InsertText calls when the event is stopped prop…

ui/base/ime/input_method_chromeos.h

 // Copyright 2014 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 UI_BASE_IME_INPUT_METHOD_CHROMEOS_H_
 #define UI_BASE_IME_INPUT_METHOD_CHROMEOS_H_
 
 #include <set>
 #include <string>
 
@@ skipping 53 matching lines @@
                                 TextInputClient* focused) override;
 
   // Asks the client to confirm current composition text.
   void ConfirmCompositionText();
 
   // Checks the availability of focused text input client and update focus
   // state.
   void UpdateContextFocusState();
 
   // Processes a key event that was already filtered by the input method.
-  // A VKEY_PROCESSKEY may be dispatched to the focused View.
-  void ProcessFilteredKeyPressEvent(const ui::KeyEvent& event);
+  // A VKEY_PROCESSKEY may be dispatched to the EventTargets.
+  // It returns the result of whether the event has been stopped propagation
+  // when dispatching post IME.
+  bool ProcessFilteredKeyPressEvent(const ui::KeyEvent& event);
 
   // Processes a key event that was not filtered by the input method.
   void ProcessUnfilteredKeyPressEvent(const ui::KeyEvent& event);
 
   // Sends input method result caused by the given key event to the focused text
   // input client.
   void ProcessInputMethodResult(const ui::KeyEvent& event, bool filtered);
 
   // Checks if the pending input method result needs inserting into the focused
   // text input client as a single character.
@@ skipping 57 matching lines @@
 
   // Used for making callbacks.
   base::WeakPtrFactory<InputMethodChromeOS> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(InputMethodChromeOS);
 };
 
 }  // namespace ui
 
 #endif  // UI_BASE_IME_INPUT_METHOD_CHROMEOS_H_