Remove support for NPObjects.

content/renderer/npapi/webplugin_impl.h

Index: content/renderer/npapi/webplugin_impl.h
diff --git a/content/renderer/npapi/webplugin_impl.h b/content/renderer/npapi/webplugin_impl.h
index a7408cb69c6d70796c7ba444d876cacf0718e8d7..db85bbcaa9bf4b39a9237872cc6e1363b5a83681 100644
--- a/content/renderer/npapi/webplugin_impl.h
+++ b/content/renderer/npapi/webplugin_impl.h
@@ -73,8 +73,6 @@ class WebPluginImpl : public WebPlugin,
   // blink::WebPlugin methods:
   bool initialize(blink::WebPluginContainer* container) override;
   void destroy() override;
-  NPObject* scriptableObject() override;
-  struct _NPP* pluginNPP() override;
   bool getFormValue(blink::WebString& value) override;
   void layoutIfNeeded() override;
   void paint(blink::WebCanvas* canvas,
@@ -103,8 +101,6 @@ class WebPluginImpl : public WebPlugin,
   void CancelResource(unsigned long id) override;
   void Invalidate() override;
   void InvalidateRect(const gfx::Rect& rect) override;
-  NPObject* GetWindowScriptNPObject() override;
-  NPObject* GetPluginElement() override;
   bool FindProxyForUrl(const GURL& url, std::string* proxy_list) override;
   void SetCookie(const GURL& url,
                  const GURL& first_party_for_cookies,
@@ -251,9 +247,6 @@ class WebPluginImpl : public WebPlugin,
   // This is just a weak reference.
   blink::WebPluginContainer* container_;
 
-  // Unique identifier for this plugin, used to track script objects.
-  struct _NPP* npp_;
-
   typedef std::map<WebPluginResourceClient*, MultipartResponseDelegate*>
       MultiPartResponseHandlerMap;
   // Tracks HTTP multipart response handlers instantiated for