Delete the GTK+ port of Chrome.

chrome/browser/extensions/extension_view_host.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 CHROME_BROWSER_EXTENSIONS_EXTENSION_VIEW_HOST_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_VIEW_HOST_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "components/web_modal/web_contents_modal_dialog_host.h"
 #include "components/web_modal/web_contents_modal_dialog_manager_delegate.h"
 #include "extensions/browser/extension_host.h"
 
 #if defined(TOOLKIT_VIEWS)
 #include "chrome/browser/ui/views/extensions/extension_view_views.h"
 #elif defined(OS_MACOSX)
 #include "chrome/browser/ui/cocoa/extensions/extension_view_mac.h"
-#elif defined(TOOLKIT_GTK)
-#include "chrome/browser/ui/gtk/extensions/extension_view_gtk.h"
 #elif defined(OS_ANDROID)
 #include "chrome/browser/ui/android/extensions/extension_view_android.h"
 #endif
 
 class Browser;
 
 namespace content {
 class SiteInstance;
 class WebContents;
 }
@@ skipping 12 matching lines @@
                     content::SiteInstance* site_instance,
                     const GURL& url,
                     ViewType host_type);
   virtual ~ExtensionViewHost();
 
   // TODO(jamescook): Create platform specific subclasses?
 #if defined(TOOLKIT_VIEWS)
   typedef ExtensionViewViews PlatformExtensionView;
 #elif defined(OS_MACOSX)
   typedef ExtensionViewMac PlatformExtensionView;
-#elif defined(TOOLKIT_GTK)
-  typedef ExtensionViewGtk PlatformExtensionView;
 #elif defined(OS_ANDROID)
   // Android does not support extensions.
   typedef ExtensionViewAndroid PlatformExtensionView;
 #endif
 
   PlatformExtensionView* view() { return view_.get(); }
 
   // Create an ExtensionView and tie it to this host and |browser|.  Note NULL
   // is a valid argument for |browser|.  Extension views may be bound to
   // tab-contents hosted in ExternalTabContainer objects, which do not
@@ skipping 81 matching lines @@
   // Observer to detect when the associated web contents is destroyed.
   class AssociatedWebContentsObserver;
   scoped_ptr<AssociatedWebContentsObserver> associated_web_contents_observer_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionViewHost);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_VIEW_HOST_H_