Change most uses of Pickle to base::Pickle

ppapi/proxy/serialized_var.cc

 // 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.
 
 #include "ppapi/proxy/serialized_var.h"
 
 #include "base/logging.h"
 #include "ipc/ipc_message_utils.h"
 #include "ppapi/c/pp_instance.h"
 #include "ppapi/proxy/dispatcher.h"
@@ skipping 117 matching lines @@
     const HandleWriter& handle_writer) const {
   if (raw_var_data_) {
     m->WriteBool(true);  // Success.
     raw_var_data_->Write(m, handle_writer);
   } else {
     m->WriteBool(false);  // Failure.
   }
 }
 
 bool SerializedVar::Inner::ReadFromMessage(const IPC::Message* m,
-                                           PickleIterator* iter) {
+                                           base::PickleIterator* iter) {
 #ifndef NDEBUG
   // We should only deserialize something once or will end up with leaked
   // references.
   //
   // One place this has happened in the past is using
   // std::vector<SerializedVar>.resize(). If you're doing this manually instead
   // of using the helper classes for handling in/out vectors of vars, be
   // sure you use the same pattern as the SerializedVarVector classes.
   DCHECK(!has_been_deserialized_);
   has_been_deserialized_ = true;
@@ skipping 309 matching lines @@
     const std::string& str) {
   inner_->ForceSetVarValueForTest(StringVar::StringToPPVar(str));
 }
 
 SerializedVarTestReader::SerializedVarTestReader(const SerializedVar& var)
     : SerializedVar(var) {
 }
 
 }  // namespace proxy
 }  // namespace ppapi