Move Pickle to base namespace.

extensions/common/permissions/settings_override_permission.h

 // Copyright 2014 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 EXTENSIONS_COMMON_PERMISSIONS_SETTINGS_OVERRIDE_PERMISSION_H_
 #define EXTENSIONS_COMMON_PERMISSIONS_SETTINGS_OVERRIDE_PERMISSION_H_
 
 #include <string>
 
 #include "extensions/common/permissions/api_permission.h"
@@ skipping 17 matching lines @@
   bool Equal(const APIPermission* rhs) const override;
   bool FromValue(const base::Value* value,
                  std::string* error,
                  std::vector<std::string>* unhandled_permissions) override;
   scoped_ptr<base::Value> ToValue() const override;
   APIPermission* Clone() const override;
   APIPermission* Diff(const APIPermission* rhs) const override;
   APIPermission* Union(const APIPermission* rhs) const override;
   APIPermission* Intersect(const APIPermission* rhs) const override;
   void Write(IPC::Message* m) const override;
-  bool Read(const IPC::Message* m, PickleIterator* iter) override;
+  bool Read(const IPC::Message* m, base::PickleIterator* iter) override;
   void Log(std::string* log) const override;
 
  private:
   std::string setting_value_;
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_COMMON_PERMISSIONS_SETTINGS_OVERRIDE_PERMISSION_H_