Cache the mimeTypes and plugins DOM objects.

third_party/WebKit/Source/modules/plugins/DOMMimeType.cpp

Index: third_party/WebKit/Source/modules/plugins/DOMMimeType.cpp
diff --git a/third_party/WebKit/Source/modules/plugins/DOMMimeType.cpp b/third_party/WebKit/Source/modules/plugins/DOMMimeType.cpp
index 63177accf1ae11352ddfdaee68b0f7c1d8c3dda4..827ca2728bd511d5f8f43ef8a5d7d7de11f06aa1 100644
--- a/third_party/WebKit/Source/modules/plugins/DOMMimeType.cpp
+++ b/third_party/WebKit/Source/modules/plugins/DOMMimeType.cpp
@@ -18,10 +18,13 @@
 
 #include "modules/plugins/DOMMimeType.h"
 
+#include "core/frame/LocalDOMWindow.h"
 #include "core/frame/LocalFrame.h"
 #include "core/loader/FrameLoader.h"
 #include "core/page/Page.h"
 #include "modules/plugins/DOMPlugin.h"
+#include "modules/plugins/DOMPluginArray.h"
+#include "modules/plugins/NavigatorPlugins.h"
 #include "wtf/text/StringBuilder.h"
 
 namespace blink {
@@ -73,7 +76,7 @@ DOMPlugin* DOMMimeType::enabledPlugin() const
     if (!frame() || !frame()->loader().allowPlugins(NotAboutToInstantiatePlugin))
         return nullptr;
 
-    return DOMPlugin::create(m_pluginData.get(), frame(), m_pluginData->mimePluginIndices()[m_index]);
+    return NavigatorPlugins::plugins(*frame()->domWindow()->navigator())->getPlugin(m_pluginData->mimePluginIndices()[m_index]);
 }
 
 } // namespace blink