Change most uses of Pickle to base::Pickle

components/nacl/loader/nacl_ipc_adapter.cc

Index: components/nacl/loader/nacl_ipc_adapter.cc
diff --git a/components/nacl/loader/nacl_ipc_adapter.cc b/components/nacl/loader/nacl_ipc_adapter.cc
index 8e402e11a00cd263e1aa32bceeb0c39810cbd4f7..a9ea0b8d8d2976bde12c90c8f0773988e2493924 100644
--- a/components/nacl/loader/nacl_ipc_adapter.cc
+++ b/components/nacl/loader/nacl_ipc_adapter.cc
@@ -485,7 +485,7 @@ bool NaClIPCAdapter::OnMessageReceived(const IPC::Message& msg) {
   // Handle PpapiHostMsg_OpenResource outside the lock as it requires sending
   // IPC to handle properly.
   if (type == PpapiHostMsg_OpenResource::ID) {
-    PickleIterator iter = IPC::SyncMessage::GetDataIterator(&msg);
+    base::PickleIterator iter = IPC::SyncMessage::GetDataIterator(&msg);
     ppapi::proxy::SerializedHandle sh;
     uint64_t token_lo;
     uint64_t token_hi;
@@ -639,7 +639,7 @@ void NaClIPCAdapter::SaveOpenResourceMessage(
     // The file token didn't resolve successfully, so we give the
     // original FD to the client without making a validated NaClDesc.
     // However, we must rewrite the message to clear the file tokens.
-    PickleIterator iter = IPC::SyncMessage::GetDataIterator(&orig_msg);
+    base::PickleIterator iter = IPC::SyncMessage::GetDataIterator(&orig_msg);
     ppapi::proxy::SerializedHandle sh;
 
     // We know that this can be read safely; see the original read in