Store HostContentSettingsMap separately so we can access it from the IO thread.

chrome/browser/renderer_host/render_message_filter.h

Index: chrome/browser/renderer_host/render_message_filter.h
diff --git a/chrome/browser/renderer_host/render_message_filter.h b/chrome/browser/renderer_host/render_message_filter.h
index e912aaa06cec387e7489624edf8d5a778ca44a95..d783afd05f3fc4e063e59513d21825eba3ef2bef 100644
--- a/chrome/browser/renderer_host/render_message_filter.h
+++ b/chrome/browser/renderer_host/render_message_filter.h
@@ -34,6 +34,7 @@
 
 class ChromeURLRequestContext;
 struct FontDescriptor;
+class HostContentSettingsMap;
 class HostZoomMap;
 class NotificationsPrefsCache;
 class PpapiPluginProcessHost;
@@ -413,6 +414,10 @@ class RenderMessageFilter : public IPC::ChannelProxy::MessageFilter,
   // accessed on the UI thread!
   Profile* profile_;
 
+  // The host content settings map. Stored separately from the profile so we can
+  // access it on other threads.
+  HostContentSettingsMap* content_settings_;
+
   // Helper class for handling PluginProcessHost_ResolveProxy messages (manages
   // the requests to the proxy service).
   ResolveProxyMsgHelper resolve_proxy_msg_helper_;