Add ResolveProxy to the content API

content/renderer/render_thread_impl.cc

Index: content/renderer/render_thread_impl.cc
diff --git a/content/renderer/render_thread_impl.cc b/content/renderer/render_thread_impl.cc
index ce775a8f7c9126b4f77ea09f6fad079fe7c363d8..7b52bf178cfc49ee56d00529f47a898b12ab3b65 100644
--- a/content/renderer/render_thread_impl.cc
+++ b/content/renderer/render_thread_impl.cc
@@ -848,6 +848,12 @@ void RenderThreadImpl::UpdateHistograms(int sequence_number) {
   child_histogram_message_filter()->SendHistograms(sequence_number);
 }
 
+bool RenderThreadImpl::ResolveProxy(const GURL& url, std::string* proxy_list) {
+  bool result = false;
+  Send(new ViewHostMsg_ResolveProxy(url, &result, proxy_list));
+  return result;
+}
+
 void RenderThreadImpl::PostponeIdleNotification() {
   idle_notifications_to_skip_ = 2;
 }