FBTF: Remove unneeded headers from base/ (part 2)

chrome/browser/net/resolve_proxy_msg_helper_unittest.cc

 // Copyright (c) 2010 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 "chrome/browser/net/resolve_proxy_msg_helper.h"
 
-#include "base/waitable_event.h"
 #include "net/base/net_errors.h"
 #include "net/proxy/mock_proxy_resolver.h"
 #include "net/proxy/proxy_config_service.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 // This ProxyConfigService always returns "http://pac" as the PAC url to use.
 class MockProxyConfigService : public net::ProxyConfigService {
  public:
   virtual void AddObserver(Observer* observer) {}
   virtual void RemoveObserver(Observer* observer) {}
@@ skipping 207 matching lines @@
 
   // The pending requests sent to the proxy resolver should have been cancelled.
 
   EXPECT_EQ(0u, resolver->pending_requests().size());
 
   EXPECT_TRUE(delegate.pending_result() == NULL);
 
   // It should also be the case that msg1, msg2, msg3 were deleted by the
   // cancellation. (Else will show up as a leak in Purify/Valgrind).
 }