Fix copying from interstitial pages on OSX.

content/browser/frame_host/interstitial_page_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_INTERSTITIAL_PAGE_IMPL_H_
 #define CONTENT_BROWSER_FRAME_HOST_INTERSTITIAL_PAGE_IMPL_H_
 
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
@@ skipping 45 matching lines @@
                        InterstitialPageDelegate* delegate);
   ~InterstitialPageImpl() override;
 
   // InterstitialPage implementation:
   void Show() override;
   void Hide() override;
   void DontProceed() override;
   void Proceed() override;
   RenderFrameHost* GetMainFrame() const override;
   InterstitialPageDelegate* GetDelegateForTesting() override;
+  WebContents* GetAsWebContents() override;

[Charlie Reis, 2015/04/27 23:39:26]

This is not defined in InterstitialPage, so it doesn't belong in this section
(under line 59).

Are you overriding it from RenderFrameHostDelegate?

   void DontCreateViewForTesting() override;
   void SetSize(const gfx::Size& size) override;
   void Focus() override;
 
   // Allows the user to navigate away by disabling the interstitial, canceling
   // the pending request, and unblocking the hidden renderer.  The interstitial
   // will stay visible until the navigation completes.
   void CancelForNavigation();
 
   // Focus the first (last if reverse is true) element in the interstitial page.
@@ skipping 211 matching lines @@
   scoped_refptr<SessionStorageNamespace> session_storage_namespace_;
 
   base::WeakPtrFactory<InterstitialPageImpl> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(InterstitialPageImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_FRAME_HOST_INTERSTITIAL_PAGE_IMPL_H_