Make sure Widget::dispose() respects UpdateSuspendScope.

third_party/WebKit/Source/core/html/HTMLPlugInElement.cpp

Index: third_party/WebKit/Source/core/html/HTMLPlugInElement.cpp
diff --git a/third_party/WebKit/Source/core/html/HTMLPlugInElement.cpp b/third_party/WebKit/Source/core/html/HTMLPlugInElement.cpp
index c48fbe6b0b1492f8f41e49800b154b60cf5ed856..2fd65e7c3b462c88b22deac0db96697e2f0cf9bc 100644
--- a/third_party/WebKit/Source/core/html/HTMLPlugInElement.cpp
+++ b/third_party/WebKit/Source/core/html/HTMLPlugInElement.cpp
@@ -89,7 +89,7 @@ void HTMLPlugInElement::setPersistedPluginWidget(Widget* widget)
     if (m_persistedPluginWidget) {
         if (m_persistedPluginWidget->isPluginView()) {
             m_persistedPluginWidget->hide();
-            m_persistedPluginWidget->dispose();
+            disposeWidgetSoon(m_persistedPluginWidget.release());
         } else {
             ASSERT(m_persistedPluginWidget->isFrameView() || m_persistedPluginWidget->isRemoteFrameView());
         }