Move Pickle to base namespace.

components/sessions/session_command.h

 // Copyright 2006 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 COMPONENTS_SESSIONS_SESSION_COMMAND_H_
 #define COMPONENTS_SESSIONS_SESSION_COMMAND_H_
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "components/sessions/sessions_export.h"
 
+namespace base {
 class Pickle;
+}
 
 namespace sessions {
 
 // SessionCommand contains a command id and arbitrary chunk of data. The id
 // and chunk of data are specific to the service creating them.
 //
 // Both TabRestoreService and SessionService use SessionCommands to represent
 // state on disk.
 //
 // There are two ways to create a SessionCommand:
 // . Specifiy the size of the data block to create. This is useful for
 //   commands that have a fixed size.
 // . From a pickle, this is useful for commands whose length varies.
 class SESSIONS_EXPORT SessionCommand {
  public:
   // These get written to disk, so we define types for them.
   // Type for the identifier.
   typedef uint8 id_type;
 
   // Type for writing the size.
   typedef uint16 size_type;
 
   // Creates a session command with the specified id. This allocates a buffer
   // of size |size| that must be filled via contents().
   SessionCommand(id_type id, size_type size);
 
   // Convenience constructor that creates a session command with the specified
   // id whose contents is populated from the contents of pickle.
-  SessionCommand(id_type id, const Pickle& pickle);
+  SessionCommand(id_type id, const base::Pickle& pickle);
 
   // The contents of the command.
   char* contents() { return const_cast<char*>(contents_.c_str()); }
   const char* contents() const { return contents_.c_str(); }
 
   // Identifier for the command.
   id_type id() const { return id_; }
 
   // Size of data.
   size_type size() const { return static_cast<size_type>(contents_.size()); }
 
   // Convenience for extracting the data to a target. Returns false if
   // count is not equal to the size of data this command contains.
   bool GetPayload(void* dest, size_t count) const;
 
   // Returns the contents as a pickle. It is up to the caller to delete the
   // returned Pickle. The returned Pickle references the underlying data of
   // this SessionCommand. If you need it to outlive the command, copy the
   // pickle.
-  Pickle* PayloadAsPickle() const;
+  base::Pickle* PayloadAsPickle() const;
 
  private:
   const id_type id_;
   std::string contents_;
 
   DISALLOW_COPY_AND_ASSIGN(SessionCommand);
 };
 
 }  // namespace sessions
 
 #endif  // COMPONENTS_SESSIONS_SESSION_COMMAND_H_