Add FilePath to base namespace.

chrome/browser/extensions/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_
 
 #include <vector>
 
 #include "base/memory/linked_ptr.h"
 #include "chrome/common/extensions/manifest.h"
 
-class FilePath;
 class GURL;
 class Version;
 
+namespace base {
+class FilePath;
+}
+
 namespace extensions {
 
 // This class is an abstract class for implementing external extensions
 // providers.
 class ExternalProviderInterface {
  public:
   // ExternalProvider uses this interface to communicate back to the
   // caller what extensions are registered, and which |id|, |version| and |path|
   // they have. See also VisitRegisteredExtension below. Ownership of |version|
   // is not transferred to the visitor.  Callers of the methods below must
   // ensure that |id| is a valid extension id (use Extension::IdIsValid(id)).
   class VisitorInterface {
    public:
     // Return true if the extension install will proceed.  Install will not
     // proceed if the extension is already installed from a higher priority
     // location.
     virtual bool OnExternalExtensionFileFound(
         const std::string& id,
         const Version* version,
-        const FilePath& path,
+        const base::FilePath& path,
         Manifest::Location location,
         int creation_flags,
         bool mark_acknowledged) = 0;
 
     // Return true if the extension install will proceed.  Install might not
     // proceed if the extension is already installed from a higher priority
     // location.
     virtual bool OnExternalExtensionUpdateUrlFound(
         const std::string& id,
         const GURL& update_url,
@@ skipping 36 matching lines @@
   // 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_