Fix plugin placeholder invalidation issue

components/plugins/renderer/webview_plugin.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/webview_plugin.h"
 
 #include "base/message_loop/message_loop.h"
 #include "base/metrics/histogram.h"
 #include "base/numerics/safe_conversions.h"
 #include "content/public/common/web_preferences.h"
@@ skipping 217 matching lines @@
 
 void WebViewPlugin::didInvalidateRect(const WebRect& rect) {
   if (container_)
     container_->invalidateRect(rect);
 }
 
 void WebViewPlugin::didChangeCursor(const WebCursorInfo& cursor) {
   current_cursor_ = cursor;
 }
 
+void WebViewPlugin::scheduleAnimation() {
+  if (container_)
+    container_->invalidate();
+}
+
 void WebViewPlugin::didClearWindowObject(WebLocalFrame* frame) {
   if (delegate_)
     delegate_->BindWebFrame(frame);
 }
 
 void WebViewPlugin::didReceiveResponse(WebLocalFrame* frame,
                                        unsigned identifier,
                                        const WebURLResponse& response) {
   WebFrameClient::didReceiveResponse(frame, identifier, response);
 }