Change most uses of Pickle to base::Pickle

content/browser/frame_host/render_frame_host_impl.cc

Index: content/browser/frame_host/render_frame_host_impl.cc
diff --git a/content/browser/frame_host/render_frame_host_impl.cc b/content/browser/frame_host/render_frame_host_impl.cc
index 18bf1e4efdb28d908a4dfd3faeab328959cddc2b..f48eb899daabdea3adc7298cfc5733b2be49b4af 100644
--- a/content/browser/frame_host/render_frame_host_impl.cc
+++ b/content/browser/frame_host/render_frame_host_impl.cc
@@ -797,7 +797,7 @@ void RenderFrameHostImpl::OnDidFailLoadWithError(
 void RenderFrameHostImpl::OnDidCommitProvisionalLoad(const IPC::Message& msg) {
   // Read the parameters out of the IPC message directly to avoid making another
   // copy when we filter the URLs.
-  PickleIterator iter(msg);
+  base::PickleIterator iter(msg);
   FrameHostMsg_DidCommitProvisionalLoad_Params validated_params;
   if (!IPC::ParamTraits<FrameHostMsg_DidCommitProvisionalLoad_Params>::
       Read(&msg, &iter, &validated_params))