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

net/url_request/url_request_throttler_simulation_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.
 
 // The tests in this file attempt to verify the following through simulation:
 // a) That a server experiencing overload will actually benefit from the
 //    anti-DDoS throttling logic, i.e. that its traffic spike will subside
 //    and be distributed over a longer period of time;
 // b) That "well-behaved" clients of a server under DDoS attack actually
 //    benefit from the anti-DDoS throttling logic; and
@@ skipping 279 matching lines @@
 
   TestURLRequestContext context_;
   TestURLRequest mock_request_;
 
   DISALLOW_COPY_AND_ASSIGN(Server);
 };
 
 // Mock throttler entry used by Requester class.
 class MockURLRequestThrottlerEntry : public URLRequestThrottlerEntry {
  public:
-  explicit MockURLRequestThrottlerEntry(
-      URLRequestThrottlerManager* manager)
-      : URLRequestThrottlerEntry(manager, ""),
-        mock_backoff_entry_(&backoff_policy_) {
-  }
+  explicit MockURLRequestThrottlerEntry(URLRequestThrottlerManager* manager)
+      : URLRequestThrottlerEntry(manager, std::string()),
+        mock_backoff_entry_(&backoff_policy_) {}
 
   virtual const BackoffEntry* GetBackoffEntry() const OVERRIDE {
     return &mock_backoff_entry_;
   }
 
   virtual BackoffEntry* GetBackoffEntry() OVERRIDE {
     return &mock_backoff_entry_;
   }
 
   virtual TimeTicks ImplGetTimeNow() const OVERRIDE {
@@ skipping 111 matching lines @@
       effective_delay -= current_jitter;
     } else {
       effective_delay += current_jitter;
     }
 
     if (throttler_entry_->fake_now() - time_of_last_attempt_ >
         effective_delay) {
       if (!throttler_entry_->ShouldRejectRequest(server_->mock_request())) {
         int status_code = server_->HandleRequest();
         MockURLRequestThrottlerHeaderAdapter response_headers(status_code);
-        throttler_entry_->UpdateWithResponse("", &response_headers);
+        throttler_entry_->UpdateWithResponse(std::string(), &response_headers);
 
         if (status_code == 200) {
           if (results_)
             results_->AddSuccess();
 
           if (last_attempt_was_failure_) {
             last_downtime_duration_ =
                 throttler_entry_->fake_now() - time_of_last_success_;
           }
 
@@ skipping 301 matching lines @@
     trials[i].PrintTrialDescription();
     trials[i].stats.ReportTrialResult(increase_ratio);
   }
 
   VerboseOut("Average increase ratio was %.4f\n", average_increase_ratio);
   VerboseOut("Maximum increase ratio was %.4f\n", max_increase_ratio);
 }
 
 }  // namespace
 }  // namespace net