Reduce the public method footprint of GuestViewBase and derived types.

extensions/browser/guest_view/extension_view/extension_view_guest.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef EXTENSIONS_BROWSER_GUEST_VIEW_EXTENSION_VIEW_EXTENSION_VIEW_GUEST_H_
 #define EXTENSIONS_BROWSER_GUEST_VIEW_EXTENSION_VIEW_EXTENSION_VIEW_GUEST_H_
 
 #include "base/macros.h"
 #include "components/guest_view/browser/guest_view.h"
 #include "extensions/browser/extension_function_dispatcher.h"
 #include "url/gurl.h"
 
 namespace content {
 class BrowserContext;
 }
 
 namespace extensions {
 
 class ExtensionViewGuest
     : public guest_view::GuestView<ExtensionViewGuest> {
  public:
   static const char Type[];
   static guest_view::GuestViewBase* Create(
       content::WebContents* owner_web_contents);
 
   // Request navigating the guest to the provided |src| URL.
   // Returns true if the navigation is successful.
   bool NavigateGuest(const std::string& src, bool force_navigation);
 
+ private:
+  ExtensionViewGuest(content::WebContents* owner_web_contents);
+  ~ExtensionViewGuest() override;
+
   // GuestViewBase implementation.
-  bool CanRunInDetachedState() const override;
+  bool CanRunInDetachedState() const final;
   void CreateWebContents(const base::DictionaryValue& create_params,
-                         const WebContentsCreatedCallback& callback) override;
-  void DidInitialize(const base::DictionaryValue& create_params) override;
-  void DidAttachToEmbedder() override;
-  const char* GetAPINamespace() const override;
-  int GetTaskPrefix() const override;
+                         const WebContentsCreatedCallback& callback) final;
+  void DidInitialize(const base::DictionaryValue& create_params) final;
+  void DidAttachToEmbedder() final;
+  const char* GetAPINamespace() const final;
+  int GetTaskPrefix() const final;
 
   // content::WebContentsObserver implementation.
   void DidCommitProvisionalLoadForFrame(
       content::RenderFrameHost* render_frame_host,
       const GURL& url,
-      ui::PageTransition transition_type) override;
-  void DidNavigateMainFrame(
-      const content::LoadCommittedDetails& details,
-      const content::FrameNavigateParams& params) override;
-
- private:
-  ExtensionViewGuest(content::WebContents* owner_web_contents);
-  ~ExtensionViewGuest() override;
+      ui::PageTransition transition_type) final;
+  void DidNavigateMainFrame(const content::LoadCommittedDetails& details,
+                            const content::FrameNavigateParams& params) final;
 
   // Applies attributes to the extensionview.
   void ApplyAttributes(const base::DictionaryValue& params);
 
   // The full URL that the extensionview is currently navigated to.
   GURL url_;
 
   // The extension URL, including the extension scheme and extension ID.
   GURL extension_url_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionViewGuest);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_GUEST_VIEW_EXTENSION_VIEW_EXTENSION_VIEW_GUEST_H_