Remove unused member in RenderFrameHostImpl.

content/browser/frame_host/render_frame_host_impl.h

Index: content/browser/frame_host/render_frame_host_impl.h
diff --git a/content/browser/frame_host/render_frame_host_impl.h b/content/browser/frame_host/render_frame_host_impl.h
index 50a02227e1d8c7f80ed543e713eed67560871945..46811a8cf37489b936496e99228bb615b998b374 100644
--- a/content/browser/frame_host/render_frame_host_impl.h
+++ b/content/browser/frame_host/render_frame_host_impl.h
@@ -311,10 +311,6 @@ class CONTENT_EXPORT RenderFrameHostImpl
 
   GlobalFrameRoutingId GetGlobalFrameRoutingId();
 
-  void set_render_frame_proxy_host(RenderFrameProxyHost* proxy) {
-    render_frame_proxy_host_ = proxy;
-  }
-
   // The unique ID of the latest NavigationEntry that this RenderFrameHost is
   // showing. This may change even when this frame hasn't committed a page,
   // such as for a new subframe navigation in a different frame.
@@ -900,12 +896,6 @@ class CONTENT_EXPORT RenderFrameHostImpl
   // Cache a pointer to avoid unnecessary process creation.
   RenderProcessHost* process_;
 
-  // The proxy created for this RenderFrameHost. It is used to send and receive
-  // IPC messages while in swapped out state.
-  // TODO(nasko): This can be removed once we don't have a swapped out state on
-  // RenderFrameHosts. See https://crbug.com/357747.
-  RenderFrameProxyHost* render_frame_proxy_host_;
-
   // Reference to the whole frame tree that this RenderFrameHost belongs to.
   // Allows this RenderFrameHost to add and remove nodes in response to
   // messages from the renderer requesting DOM manipulation.