Move some dependencies of ExtensionService down to extensions.

extensions/browser/external_provider_interface.h

 // Copyright (c) 2012 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_EXTERNAL_PROVIDER_INTERFACE_H_
-#define CHROME_BROWSER_EXTENSIONS_EXTERNAL_PROVIDER_INTERFACE_H_
+#ifndef EXTENSIONS_BROWSER_EXTERNAL_PROVIDER_INTERFACE_H_
+#define EXTENSIONS_BROWSER_EXTERNAL_PROVIDER_INTERFACE_H_
 
 #include <vector>
 
 #include "base/memory/linked_ptr.h"
 #include "extensions/common/manifest.h"
 
 class GURL;
 
 namespace base {
 class FilePath;
@@ skipping 71 matching lines @@
   // Determines if this provider had loaded the list of external extensions
   // from its source.
   virtual bool IsReady() const = 0;
 };
 
 typedef std::vector<linked_ptr<ExternalProviderInterface> >
     ProviderCollection;
 
 }  // namespace extensions
 
-#endif  // CHROME_BROWSER_EXTENSIONS_EXTERNAL_PROVIDER_INTERFACE_H_
+#endif  // EXTENSIONS_BROWSER_EXTERNAL_PROVIDER_INTERFACE_H_