Remove unused member in RenderFrameHostImpl.

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 f74e19a27a75a49ba84ac89963f48479fae5a23b..a9c10a771ffcf33019e3e3feca692a3a4bbf8c73 100644
--- a/content/browser/frame_host/render_frame_host_impl.cc
+++ b/content/browser/frame_host/render_frame_host_impl.cc
@@ -317,7 +317,6 @@ RenderFrameHostImpl::RenderFrameHostImpl(SiteInstance* site_instance,
       delegate_(delegate),
       site_instance_(static_cast<SiteInstanceImpl*>(site_instance)),
       process_(site_instance->GetProcess()),
-      render_frame_proxy_host_(NULL),
       frame_tree_(frame_tree),
       frame_tree_node_(frame_tree_node),
       parent_(nullptr),
@@ -1383,8 +1382,6 @@ void RenderFrameHostImpl::SwapOut(
   // short-lived and will be deleted when the SwapOut ACK is received.
   CHECK(proxy);
 
-  set_render_frame_proxy_host(proxy);
-
   if (IsRenderFrameLive()) {
     FrameReplicationState replication_state =
         proxy->frame_tree_node()->current_replication_state();