Improve performance of proxy resolver by tracing DNS dependencies.

net/http/http_network_transaction_spdy2_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "net/http/http_network_transaction.h"
 
 #include <math.h>  // ceil
 #include <stdarg.h>
 #include <string>
 #include <vector>
@@ skipping 8066 matching lines @@
 
   virtual void CancelRequest(RequestHandle request) {
     NOTREACHED();
   }
 
   virtual LoadState GetLoadState(RequestHandle request) const OVERRIDE {
     NOTREACHED();
     return LOAD_STATE_IDLE;
   }
 
-  virtual LoadState GetLoadStateThreadSafe(
-      RequestHandle request) const OVERRIDE {
-    NOTREACHED();
-    return LOAD_STATE_IDLE;
-  }
-
   virtual void CancelSetPacScript() {
     NOTREACHED();
   }
 
   virtual int SetPacScript(const scoped_refptr<ProxyResolverScriptData>&,
                            const CompletionCallback& /*callback*/) {
     return OK;
   }
 
   const std::vector<GURL>& resolved() const { return resolved_; }
@@ skipping 2635 matching lines @@
             trans2.Start(&request2, callback2.callback(), BoundNetLog()));
   MessageLoop::current()->RunUntilIdle();
   data2->RunFor(3);
 
   ASSERT_TRUE(callback2.have_result());
   EXPECT_EQ(OK, callback2.WaitForResult());
   EXPECT_TRUE(trans2.GetResponseInfo()->was_fetched_via_spdy);
 }
 
 }  // namespace net