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

components/plugins/renderer/webview_plugin.cc

Index: components/plugins/renderer/webview_plugin.cc
diff --git a/components/plugins/renderer/webview_plugin.cc b/components/plugins/renderer/webview_plugin.cc
index faf56e29ce43ac0fb0e58fb873780afd1f403d9e..e0d8e3588dcb44f3c639686b67a710c87c6dd44b 100644
--- a/components/plugins/renderer/webview_plugin.cc
+++ b/components/plugins/renderer/webview_plugin.cc
@@ -46,7 +46,8 @@ WebViewPlugin::WebViewPlugin(WebViewPlugin::Delegate* delegate)
       container_(NULL),
       web_view_(WebView::create(this)),
       web_frame_(WebFrame::create(this)),
-      finished_loading_(false) {
+      finished_loading_(false),
+      focused_(false) {
   web_view_->setMainFrame(web_frame_);
 }
 
@@ -84,6 +85,10 @@ void WebViewPlugin::ReplayReceivedData(WebPlugin* plugin) {
         "PluginDocument.NumChunks",
         (base::checked_numeric_cast<int, size_t>(data_.size())));
   }
+  // We need to transfer the |focused_| to new plugin after it loaded.
+  if (focused_) {
+    plugin->updateFocus(true);
+  }
   if (finished_loading_) {
     plugin->didFinishLoading();
   }
@@ -150,6 +155,10 @@ void WebViewPlugin::updateGeometry(const WebRect& frame_rect,
   }
 }
 
+void WebViewPlugin::updateFocus(bool focused) {
+  focused_ = focused;
+}
+
 bool WebViewPlugin::acceptsInputEvents() { return true; }
 
 bool WebViewPlugin::handleInputEvent(const WebInputEvent& event,