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

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 835 matching lines @@
  protected:
   virtual void StartAsync() {
     this->NotifyRestartRequired();
   }
  private:
   ~RestartTestJob() {}
 };
 
 class CancelTestJob : public URLRequestTestJob {
  public:
-  explicit CancelTestJob(URLRequest* request, NetworkDelegate* network_delegate)
+  CancelTestJob(URLRequest* request, NetworkDelegate* network_delegate)
     : URLRequestTestJob(request, network_delegate, true) {}
  protected:
   virtual void StartAsync() {
     request_->Cancel();
   }
  private:
   ~CancelTestJob() {}
 };
 
 class CancelThenRestartTestJob : public URLRequestTestJob {
  public:
-  explicit CancelThenRestartTestJob(URLRequest* request,
-                                    NetworkDelegate* network_delegate)
+  CancelThenRestartTestJob(URLRequest* request,
+                           NetworkDelegate* network_delegate)
       : URLRequestTestJob(request, network_delegate, true) {
   }
  protected:
   virtual void StartAsync() {
     request_->Cancel();
     this->NotifyRestartRequired();
   }
  private:
   ~CancelThenRestartTestJob() {}
 };
@@ skipping 4308 matching lines @@
 
     EXPECT_FALSE(r.is_pending());
     EXPECT_EQ(1, d->response_started_count());
     EXPECT_FALSE(d->received_data_before_response());
     EXPECT_EQ(d->bytes_received(), static_cast<int>(file_size));
   }
 }
 #endif  // !defined(DISABLE_FTP_SUPPORT)
 
 }  // namespace net