Change most uses of Pickle to base::Pickle

content/child/push_messaging/push_dispatcher.cc

Index: content/child/push_messaging/push_dispatcher.cc
diff --git a/content/child/push_messaging/push_dispatcher.cc b/content/child/push_messaging/push_dispatcher.cc
index 430344336cef9f1c473f79b0a8f99ca388c96185..8d49c12225abce7a39f2cfb43f0d10507ff620c4 100644
--- a/content/child/push_messaging/push_dispatcher.cc
+++ b/content/child/push_messaging/push_dispatcher.cc
@@ -47,7 +47,7 @@ bool PushDispatcher::GetWorkerThreadIdForMessage(const IPC::Message& msg,
                                                  int* ipc_thread_id) {
   int request_id = -1;
 
-  const bool success = PickleIterator(msg).ReadInt(&request_id);
+  const bool success = base::PickleIterator(msg).ReadInt(&request_id);
   DCHECK(success);
 
   base::AutoLock lock(request_id_map_lock_);