Move Pickle to base namespace.

extensions/common/permissions/set_disjunction_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_SET_DISJUNCTION_PERMISSION_H_
 #define EXTENSIONS_COMMON_PERMISSIONS_SET_DISJUNCTION_PERMISSION_H_
 
 #include <set>
 #include <string>
 
@@ skipping 133 matching lines @@
       scoped_ptr<base::Value> item_value(i->ToValue());
       list->Append(item_value.release());
     }
     return scoped_ptr<base::Value>(list);
   }
 
   void Write(IPC::Message* m) const override {
     IPC::WriteParam(m, data_set_);
   }
 
-  bool Read(const IPC::Message* m, PickleIterator* iter) override {
+  bool Read(const IPC::Message* m, base::PickleIterator* iter) override {
     return IPC::ReadParam(m, iter, &data_set_);
   }
 
   void Log(std::string* log) const override {
     IPC::LogParam(data_set_, log);
   }
 
  protected:
   std::set<PermissionDataType> data_set_;
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_COMMON_PERMISSIONS_SET_DISJUNCTION_PERMISSION_H_