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

chrome/browser/extensions/api/input_ime/input_ime_api_nonchromeos.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 CHROME_BROWSER_EXTENSIONS_API_INPUT_IME_INPUT_IME_API_NONCHROMEOS_H_
 #define CHROME_BROWSER_EXTENSIONS_API_INPUT_IME_INPUT_IME_API_NONCHROMEOS_H_
 
 #include "chrome/browser/extensions/api/input_ime/input_ime_event_router_base.h"
 #include "chrome/browser/profiles/profile.h"
 #include "extensions/browser/extension_function.h"
 
 class Profile;
 
+namespace input_method {
+class InputMethodEngine;
+}  // namespace input_method
+
 namespace extensions {
 
 class InputImeEventRouterBase;
 
 class InputImeEventRouter : public InputImeEventRouterBase {
  public:
   explicit InputImeEventRouter(Profile* profile);
   ~InputImeEventRouter() override;
 
+  // Registers the extension as an IME extension, allowing it to be the active
+  // engine.
+  bool RegisterImeExtension(const std::string& extension_id);
+
+  // Unregisters the extension as an IME extension and deactivates the IME
+  // engine for it, if it was active.
+  void UnregisterImeExtension(const std::string& extension_id);
+
+  // Gets the input method engine if the extension is active.
+  input_method::InputMethodEngine* GetActiveEngine(
+      const std::string& extension_id);
+
+  // Actives the extension with new input method engine, and deletes the
+  // previous engine if another extension was active.
+  void SetActiveEngine(const std::string& extension_id);
+
+ private:
+  // Deletes the current input method engine.
+  void DeleteInputMethodEngine();
+
+  // The active input method engine.
+  input_method::InputMethodEngine* active_engine_;
+
+  // The id of the all registered extensions.
+  std::vector<std::string> extension_ids_;
+
   DISALLOW_COPY_AND_ASSIGN(InputImeEventRouter);
 };
 
 class InputImeCreateWindowFunction : public UIThreadExtensionFunction {
  public:
   DECLARE_EXTENSION_FUNCTION("input.ime.createWindow", INPUT_IME_CREATEWINDOW)
 
  protected:
   ~InputImeCreateWindowFunction() override {}
 
   // ExtensionFunction:
   ExtensionFunction::ResponseAction Run() override;
 };
 
+class InputImeActivateFunction : public UIThreadExtensionFunction {
+ public:
+  DECLARE_EXTENSION_FUNCTION("input.ime.activate", INPUT_IME_ACTIVATE)
+
+ protected:
+  ~InputImeActivateFunction() override {}
+
+  // UIThreadExtensionFunction:
+  ResponseAction Run() override;
+};
+
+class InputImeDeactivateFunction : public UIThreadExtensionFunction {
+ public:
+  DECLARE_EXTENSION_FUNCTION("input.ime.deactivate", INPUT_IME_DEACTIVATE)
+
+ protected:
+  ~InputImeDeactivateFunction() override {}
+
+  // UIThreadExtensionFunction:
+  ResponseAction Run() override;
+};
+
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_INPUT_IME_INPUT_IME_API_NONCHROMEOS_H_