The first step for enabling off-the-spot IME on Pepper on ChromeOS/Linux.

webkit/plugins/ppapi/ppapi_plugin_instance.cc

 // Copyright (c) 2011 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.
 
 #include "webkit/plugins/ppapi/ppapi_plugin_instance.h"
 
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop.h"
 #include "base/metrics/histogram.h"
@@ skipping 777 matching lines @@
   instance_interface_->DidChangeView(pp_instance(), &pp_position, &pp_clip);
 }
 
 void PluginInstance::SetWebKitFocus(bool has_focus) {
   if (has_webkit_focus_ == has_focus)
     return;
 
   bool old_plugin_focus = PluginHasFocus();
   has_webkit_focus_ = has_focus;
   if (PluginHasFocus() != old_plugin_focus) {
+    delegate()->PluginFocusChanged(PluginHasFocus());
     instance_interface_->DidChangeFocus(pp_instance(),
                                         BoolToPPBool(PluginHasFocus()));
   }
 }
 
 void PluginInstance::SetContentAreaFocus(bool has_focus) {
   if (has_content_area_focus_ == has_focus)
     return;
 
   bool old_plugin_focus = PluginHasFocus();
@@ skipping 752 matching lines @@
   return found->second;
 }
 
 bool PluginInstance::IsFullPagePlugin() const {
   WebFrame* frame = container()->element().document().frame();
   return frame->view()->mainFrame()->document().isPluginDocument();
 }
 
 }  // namespace ppapi
 }  // namespace webkit