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

components/plugins/renderer/plugin_placeholder.cc

Index: components/plugins/renderer/plugin_placeholder.cc
diff --git a/components/plugins/renderer/plugin_placeholder.cc b/components/plugins/renderer/plugin_placeholder.cc
index deb64d7c02f37b5de34caee240cd92ea433925b7..5e092cd7e3fc40ae928985674bff0cfe441d0fc8 100644
--- a/components/plugins/renderer/plugin_placeholder.cc
+++ b/components/plugins/renderer/plugin_placeholder.cc
@@ -84,6 +84,11 @@ void PluginPlaceholder::ReplacePlugin(WebPlugin* new_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()) {