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

ui/base/ime/ime_engine_handler_interface.h

Index: ui/base/ime/ime_engine_handler_interface.h
diff --git a/ui/base/ime/ime_engine_handler_interface.h b/ui/base/ime/ime_engine_handler_interface.h
index a394f3776b2559aab765bb14cf30117cc818de6c..3987085386a0a7a85f7675559126305ceafd6cc0 100644
--- a/ui/base/ime/ime_engine_handler_interface.h
+++ b/ui/base/ime/ime_engine_handler_interface.h
@@ -138,6 +138,10 @@ class UI_BASE_IME_EXPORT IMEEngineHandlerInterface {
   // Hides the input view window (from API call).
   virtual void HideInputView() = 0;
 
+#elif defined(OS_LINUX) || defined(OS_WIN)
+
+  // Get the id of the IME extension.
+  virtual std::string GetExtensionId() const = 0;
 #endif  // defined(OS_CHROMEOS)
  protected:
   IMEEngineHandlerInterface() {}