Add a setNeedsLayout method to WebPluginContainer.

Source/web/WebPluginContainerImpl.cpp

Index: Source/web/WebPluginContainerImpl.cpp
diff --git a/Source/web/WebPluginContainerImpl.cpp b/Source/web/WebPluginContainerImpl.cpp
index 7057f128c57690eb3cbadea8dd5d837515d24557..c153b9234382b7c0028e5ab7f5b5bb8d8a50520a 100644
--- a/Source/web/WebPluginContainerImpl.cpp
+++ b/Source/web/WebPluginContainerImpl.cpp
@@ -413,6 +413,12 @@ void WebPluginContainerImpl::scrollRect(const WebRect& rect)
     invalidateRect(rect);
 }
 
+void WebPluginContainerImpl::setNeedsLayout()
+{
+    if (m_element->layoutObject())
+        m_element->layoutObject()->setNeedsLayout("Plugin needs layout");
+}
+
 void WebPluginContainerImpl::reportGeometry()
 {
     // We cannot compute geometry without a parent or layoutObject.