Fix an uninitialized warning treated as error on gcc 4.5.2

net/url_request/url_request_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 "build/build_config.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
 #include <shlobj.h>
 #endif
@@ skipping 1534 matching lines @@
 
 TEST_F(HTTPSOCSPTest, Valid) {
   if (!SystemSupportsOCSP()) {
     LOG(WARNING) << "Skipping test because system doesn't support OCSP";
     return;
   }
 
   TestServer::HTTPSOptions https_options(TestServer::HTTPSOptions::CERT_AUTO);
   https_options.ocsp_status = TestServer::HTTPSOptions::OCSP_OK;
 
-  CertStatus cert_status;
+  CertStatus cert_status = 0;
   DoConnection(https_options, &cert_status);
 
   EXPECT_EQ(0u, cert_status & CERT_STATUS_ALL_ERRORS);
 
   EXPECT_EQ(SystemUsesChromiumEVMetadata(),
             static_cast<bool>(cert_status & CERT_STATUS_IS_EV));
 
   EXPECT_TRUE(cert_status & CERT_STATUS_REV_CHECKING_ENABLED);
 }
 
@@ skipping 3011 matching lines @@
   req.SetExtraRequestHeaders(headers);
   req.Start();
   MessageLoop::current()->Run();
   // If the net tests are being run with ChromeFrame then we need to allow for
   // the 'chromeframe' suffix which is added to the user agent before the
   // closing parentheses.
   EXPECT_TRUE(StartsWithASCII(d.data_received(), "Lynx (textmode", true));
 }
 
 }  // namespace net