Add chrome.input.ime.activate and chrome.input.ime.deactivate API

ui/base/ime/ime_engine_handler_interface.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_IME_ENGINE_HANDLER_INTERFACE_H_
 #define UI_BASE_IME_IME_ENGINE_HANDLER_INTERFACE_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 120 matching lines @@
   // Show or hide the candidate window.
   virtual bool SetCandidateWindowVisible(bool visible, std::string* error) = 0;
 
   // Set the position of the cursor in the candidate window.
   virtual bool SetCursorPosition(int context_id,
                                  int candidate_id,
                                  std::string* error) = 0;
   // Hides the input view window (from API call).
   virtual void HideInputView() = 0;
 
+#elif defined(OS_LINUX) || defined(OS_WIN)
+
+  // Get the id of the activated extension.

[Shu Chen, 2016/01/18 09:21:59]

s/activated extension/IME extension

An engine handler represents an IME extension. GetExtensionId() should return
the extension id despite of whether it is activated.

[Azure Wei, 2016/01/19 03:46:54]

Done.

+  virtual std::string GetExtensionId() const = 0;
 #endif  // defined(OS_CHROMEOS)
  protected:
   IMEEngineHandlerInterface() {}
 };
 
 }  // namespace ui
 
 #endif  // UI_BASE_IME_IME_ENGINE_HANDLER_INTERFACE_H_