Add new text for indicating we are resolving hosts during proxy resolution.

net/proxy/proxy_resolver_v8.cc

Index: net/proxy/proxy_resolver_v8.cc
diff --git a/net/proxy/proxy_resolver_v8.cc b/net/proxy/proxy_resolver_v8.cc
index 1bd736cb480c8bf28f3e2a251edb07d0ae4dd7e1..217136d55d021309123401c1d03ab5f0a0781f90 100644
--- a/net/proxy/proxy_resolver_v8.cc
+++ b/net/proxy/proxy_resolver_v8.cc
@@ -728,6 +728,11 @@ void ProxyResolverV8::CancelRequest(RequestHandle request) {
   NOTREACHED();
 }
 
+LoadState ProxyResolverV8::GetLoadState(RequestHandle request) const {
+  NOTREACHED();
+  return LOAD_STATE_IDLE;
+}
+
 void ProxyResolverV8::CancelSetPacScript() {
   NOTREACHED();
 }