Update Mac plugin IME handling to match updated spec

chrome/browser/renderer_host/render_widget_host.h

 // Copyright (c) 2009 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_RENDERER_HOST_RENDER_WIDGET_HOST_H_
 #define CHROME_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_H_
 #pragma once
 
 #include <deque>
 #include <string>
@@ skipping 464 matching lines @@
                                     const gfx::Rect& caret_rect);
   void OnMsgImeCancelComposition();
 
   void OnMsgDidActivateAcceleratedCompositing(bool activated);
 
 #if defined(OS_MACOSX)
   void OnMsgGetScreenInfo(gfx::NativeViewId view,
                           WebKit::WebScreenInfo* results);
   void OnMsgGetWindowRect(gfx::NativeViewId window_id, gfx::Rect* results);
   void OnMsgGetRootWindowRect(gfx::NativeViewId window_id, gfx::Rect* results);
-  void OnMsgSetPluginImeEnabled(bool enabled, int plugin_id);
+  void OnMsgPluginFocusChanged(bool focused, int plugin_id);
+  void OnMsgStartPluginIme();
   void OnAllocateFakePluginWindowHandle(bool opaque,
                                         bool root,
                                         gfx::PluginWindowHandle* id);
   void OnDestroyFakePluginWindowHandle(gfx::PluginWindowHandle id);
   void OnAcceleratedSurfaceSetIOSurface(gfx::PluginWindowHandle window,
                                         int32 width,
                                         int32 height,
                                         uint64 mach_port);
   void OnAcceleratedSurfaceSetTransportDIB(gfx::PluginWindowHandle window,
                                            int32 width,
@@ skipping 171 matching lines @@
 
   std::vector<gfx::PluginWindowHandle> deferred_plugin_handles_;
 
   // The last scroll offset of the render widget.
   gfx::Size last_scroll_offset_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHost);
 };
 
 #endif  // CHROME_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_H_