Move some dependencies of ExtensionService down to extensions.

chrome/browser/extensions/external_provider_impl.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_IMPL_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTERNAL_PROVIDER_IMPL_H_
 
 #include <string>
 
-#include "chrome/browser/extensions/external_provider_interface.h"
-
 #include "base/memory/ref_counted.h"
 #include "chrome/browser/extensions/external_loader.h"
+#include "extensions/browser/external_provider_interface.h"
 #include "extensions/common/manifest.h"
 
 class Profile;
 
 namespace base {
 class DictionaryValue;
 class Version;
 }
 
 namespace extensions {
@@ skipping 87 matching lines @@
   // Whether loaded extensions should be automatically acknowledged, so that
   // the user doesn't see an alert about them.
   bool auto_acknowledge_;
 
   DISALLOW_COPY_AND_ASSIGN(ExternalProviderImpl);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTERNAL_PROVIDER_IMPL_H_