Remove support for NPObjects.

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

Index: third_party/WebKit/Source/core/html/HTMLPlugInElement.h
diff --git a/third_party/WebKit/Source/core/html/HTMLPlugInElement.h b/third_party/WebKit/Source/core/html/HTMLPlugInElement.h
index e42c201323ebfc0538eeb349c9fa8f3059a23ef9..bfb61268e8a580060bf3e1f8c320481149fde3b5 100644
--- a/third_party/WebKit/Source/core/html/HTMLPlugInElement.h
+++ b/third_party/WebKit/Source/core/html/HTMLPlugInElement.h
@@ -28,8 +28,6 @@
 #include "core/html/HTMLFrameOwnerElement.h"
 #include <v8.h>
 
-struct NPObject;
-
 namespace blink {
 
 class HTMLImageLoader;
@@ -48,9 +46,10 @@ public:
     DECLARE_VIRTUAL_TRACE();
 
     void resetInstance();
+    // TODO(dcheng): Consider removing this, since HTMLEmbedElementLegacyCall
+    // and HTMLObjectElementLegacyCall usage is extremely low.
     SharedPersistent<v8::Object>* pluginWrapper();
     Widget* pluginWidget() const;
-    NPObject* getNPObject();
     void setPluginFocus(bool focused);
     bool canProcessDrag() const;
     const String& url() const { return m_url; }
@@ -135,7 +134,6 @@ private:
     void setPersistedPluginWidget(Widget*);
 
     mutable RefPtr<SharedPersistent<v8::Object>> m_pluginWrapper;
-    NPObject* m_NPObject;
     bool m_needsWidgetUpdate;
     bool m_shouldPreferPlugInsForImages;