Ignore viewport meta tags when Request Desktop Site is enabled.

content/browser/frame_host/navigation_controller_impl.h

 // Copyright 2013 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 CONTENT_BROWSER_FRAME_HOST_NAVIGATION_CONTROLLER_IMPL_H_
 #define CONTENT_BROWSER_FRAME_HOST_NAVIGATION_CONTROLLER_IMPL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 79 matching lines @@
   void ReloadIgnoringCache(bool check_for_repost) override;
   void ReloadOriginalRequestURL(bool check_for_repost) override;
   void ReloadDisableLoFi(bool check_for_repost) override;
   void NotifyEntryChanged(const NavigationEntry* entry) override;
   void CopyStateFrom(const NavigationController& source) override;
   void CopyStateFromAndPrune(NavigationController* source,
                              bool replace_entry) override;
   bool CanPruneAllButLastCommitted() override;
   void PruneAllButLastCommitted() override;
   void ClearAllScreenshots() override;
+  void UpdateOverridingUserAgent() override;
 
   // Whether this is the initial navigation in an unmodified new tab.  In this
   // case, we know there is no content displayed in the page.
   bool IsUnmodifiedBlankTab() const;
 
   // The session storage namespace that all child RenderViews belonging to
   // |instance| should use.
   SessionStorageNamespace* GetSessionStorageNamespace(
       SiteInstance* instance);
 
@@ skipping 336 matching lines @@
   TimeSmoother time_smoother_;
 
   scoped_ptr<NavigationEntryScreenshotManager> screenshot_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(NavigationControllerImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_FRAME_HOST_NAVIGATION_CONTROLLER_IMPL_H_