Add missing (and remove superfluous) 'explicit' from constructors.

net/url_request/url_fetcher_impl_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 "net/url_request/url_fetcher_impl.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/file_util.h"
@@ skipping 392 matching lines @@
   // URLFetcherDelegate:
   virtual void OnURLFetchComplete(const URLFetcher* source) OVERRIDE;
 
   void CancelRequest();
 };
 
 // Version of TestURLRequestContext that posts a Quit task to the IO
 // thread once it is deleted.
 class CancelTestURLRequestContext : public ThrottlingTestURLRequestContext {
  public:
-  explicit CancelTestURLRequestContext() {
+  CancelTestURLRequestContext() {
   }
 
  private:
   virtual ~CancelTestURLRequestContext() {
     // The d'tor should execute in the IO thread. Post the quit task to the
     // current thread.
     MessageLoop::current()->PostTask(FROM_HERE, MessageLoop::QuitClosure());
   }
 };
 
@@ skipping 1127 matching lines @@
   MessageLoop::current()->Run();  // OnURLFetchComplete() will Quit().
 
   MessageLoop::current()->RunUntilIdle();
   ASSERT_FALSE(file_util::PathExists(file_path_))
       << file_path_.value() << " not removed.";
 }
 
 }  // namespace
 
 }  // namespace net