Remove explicit keyword from multi-argument constructors

webkit/appcache/appcache_update_job_unittest.cc

 // Copyright (c) 2011 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 "testing/gtest/include/gtest/gtest.h"
 
 #include "base/stl_util.h"
 #include "base/threading/thread.h"
 #include "base/synchronization/waitable_event.h"
 #include "net/base/net_errors.h"
@@ skipping 393 matching lines @@
         "Content-type: text/cache-manifest\0"
         "\0";
     return std::string(headers, arraysize(headers));
   }
 
   static std::string data() {
     return std::string("CACHE MANIFEST\r"
         "http://retry\r");  // must be same as kRetryUrl
   }
 
-  explicit RetryRequestTestJob(net::URLRequest* request,
-                               const std::string& headers,
-                               int response_code)
+  RetryRequestTestJob(net::URLRequest* request,
+                      const std::string& headers,
+                      int response_code)
       : net::URLRequestTestJob(request, headers, data(), true),
         response_code_(response_code) {
   }
 
   int response_code_;
 
   static int num_requests_;
   static int num_retries_;
   static RetryHeader retry_after_;
   static int expected_requests_;
@@ skipping 3118 matching lines @@
   RunTestOnIOThread(&AppCacheUpdateJobTest::CrossOriginHttpsDeniedTest);
 }
 
 }  // namespace appcache
 
 // AppCacheUpdateJobTest is expected to always live longer than the
 // runnable methods.  This lets us call NewRunnableMethod on its instances.
 DISABLE_RUNNABLE_METHOD_REFCOUNT(appcache::AppCacheUpdateJobTest);
 DISABLE_RUNNABLE_METHOD_REFCOUNT(
     appcache::AppCacheUpdateJobTest::MockAppCachePolicy);