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 3e695e61de08b87b547321b4c2f61b0e19746e87..ba05ead641bda2d319371ea43e3654b41acd1764 100644
--- a/content/renderer/npapi/webplugin_impl.h
+++ b/content/renderer/npapi/webplugin_impl.h
@@ -72,8 +72,6 @@ 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 updateAllLifecyclePhases() override;
   void paint(blink::WebCanvas* canvas,
@@ -98,8 +96,6 @@ class WebPluginImpl : public WebPlugin,
   // WebPlugin implementation:
   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,
@@ -199,9 +195,6 @@ 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_;
-
   // The plugin source URL.
   GURL plugin_url_;