Rewrite std::string("") to std::string(), Linux edition.

chrome/browser/predictors/resource_prefetcher_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 "base/memory/ref_counted.h"
 #include "base/message_loop.h"
 #include "base/memory/scoped_ptr.h"
 #include "chrome/browser/predictors/resource_prefetcher.h"
 #include "chrome/browser/predictors/resource_prefetcher_manager.h"
 #include "chrome/test/base/testing_profile.h"
@@ skipping 93 matching lines @@
          it != prefetcher_->inflight_requests_.end(); ++it) {
       if (it->first->original_url() == url)
         return it->first;
     }
     EXPECT_TRUE(false) << "Infligh request not found: " << url_str;
     return NULL;
   }
 
 
   void OnReceivedRedirect(const std::string& url) {
-    prefetcher_->OnReceivedRedirect(GetInFlightRequest(url), GURL(""), NULL);
+    prefetcher_->OnReceivedRedirect(
+        GetInFlightRequest(url), GURL(std::string()), NULL);
   }
   void OnAuthRequired(const std::string& url) {
     prefetcher_->OnAuthRequired(GetInFlightRequest(url), NULL);
   }
   void OnCertificateRequested(const std::string& url) {
     prefetcher_->OnCertificateRequested(GetInFlightRequest(url), NULL);
   }
   void OnSSLCertificateError(const std::string& url) {
     prefetcher_->OnSSLCertificateError(GetInFlightRequest(url),
                                        net::SSLInfo(), false);
@@ skipping 211 matching lines @@
               ResourcePrefetcherFinished(Eq(prefetcher_.get()),
                                          Eq(requests_ptr)));
 
   OnResponse("http://m.google.com/resource1.jpg");
   CheckPrefetcherState(0, 1, 0);
 
   delete requests_ptr;
 }
 
 }  // namespace predictors