Abstract base 'ExtensionView' to Fix DEPS violation in extension_view_host.h

chrome/browser/extensions/extension_view_host_mac.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_MAC_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_VIEW_HOST_MAC_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "chrome/browser/extensions/extension_view_host.h"
 
 namespace extensions {
 class Extension;
 
 // TODO(mpcomplete): I don't know what this does or if it is needed anymore,
 // now that ExtensionHost is restructured to rely on WebContents.
 class ExtensionViewHostMac : public ExtensionViewHost {
  public:
   ExtensionViewHostMac(const Extension* extension,
-                   content::SiteInstance* site_instance,
-                   const GURL& url,
-                   ViewType host_type) :
-      ExtensionViewHost(extension, site_instance, url, host_type) {}
+                       content::SiteInstance* site_instance,
+                       const GURL& url,
+                       ViewType host_type)
+      : ExtensionViewHost(extension, site_instance, url, host_type) {}
   virtual ~ExtensionViewHostMac();
 
  private:
-  // ExtensionViewHost overrides:
-  virtual void UnhandledKeyboardEvent(
-      content::WebContents* source,
-      const content::NativeWebKeyboardEvent& event) OVERRIDE;
-
   DISALLOW_COPY_AND_ASSIGN(ExtensionViewHostMac);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_VIEW_HOST_MAC_H_