Fix issue that IME can't be enabled when set Plugin mode to "Click to play".

components/plugins/renderer/plugin_placeholder.cc

 // Copyright 2013 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 "components/plugins/renderer/plugin_placeholder.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/json/string_escape.h"
 #include "base/strings/string_piece.h"
@@ skipping 66 matching lines @@
   container->setPlugin(new_plugin);
   // Save the element in case the plug-in is removed from the page during
   // initialization.
   WebElement element = container->element();
   if (!new_plugin->initialize(container)) {
     // We couldn't initialize the new plug-in. Restore the old one and abort.
     container->setPlugin(plugin_);
     return;
   }
 
+  // We need to transfer the |focused_| to new plugin after it loaded.

[Bernhard Bauer, 2014/01/25 14:36:37]

Move this down. After ReplayReceivedData() seems to be a good point again.

Hm, now that I think about it, it might make sense to merge this with
ReplayReceivedData() into a single method on WebViewPlugin that transfers the
state to the new plugin. If you want to do that, that would be nice, but it's
fine if you leave that particular yak-shaving to me :)

[Ruiyi Luo, 2014/01/26 09:40:28]

Agree with you. 
Merging it with ReplayReceivedData() is more reasonable and cleaner. 

+  if (plugin_->hasFocus()) {
+    new_plugin->updateFocus(true);
+  }
+
   // The plug-in has been removed from the page. Destroy the old plug-in. We
   // will be destroyed as soon as V8 garbage collects us.
   if (!element.pluginContainer()) {
     plugin_->destroy();
     return;
   }
 
   // During initialization, the new plug-in might have replaced itself in turn
   // with another plug-in. Make sure not to use the passed in |new_plugin| after
   // this point.
@@ skipping 146 matching lines @@
   identifier_ = identifier;
 }
 
 blink::WebFrame* PluginPlaceholder::GetFrame() { return frame_; }
 
 const blink::WebPluginParams& PluginPlaceholder::GetPluginParams() const {
   return plugin_params_;
 }
 
 }  // namespace plugins