Remove explicit keyword from multi-argument constructors

net/url_request/url_request_throttler_entry.h

 // 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.
 
 #ifndef NET_URL_REQUEST_URL_REQUEST_THROTTLER_ENTRY_H_
 #define NET_URL_REQUEST_URL_REQUEST_THROTTLER_ENTRY_H_
 #pragma once
 
 #include <queue>
 #include <string>
@@ skipping 53 matching lines @@
 
   // Name of the header that sites can use to opt out of exponential back-off
   // throttling.
   static const char kExponentialThrottlingHeader[];
 
   // Value for exponential throttling header that can be used to opt out of
   // exponential back-off throttling.
   static const char kExponentialThrottlingDisableValue[];
 
   // The manager object's lifetime must enclose the lifetime of this object.
-  explicit URLRequestThrottlerEntry(URLRequestThrottlerManager* manager,
-                                    const std::string& url_id);
+  URLRequestThrottlerEntry(URLRequestThrottlerManager* manager,
+                           const std::string& url_id);
 
   // The life span of instances created with this constructor is set to
   // infinite, and the number of initial errors to ignore is set to 0.
   // It is only used by unit tests.
   URLRequestThrottlerEntry(URLRequestThrottlerManager* manager,
                            const std::string& url_id,
                            int sliding_window_period_ms,
                            int max_send_threshold,
                            int initial_backoff_ms,
                            double multiply_factor,
@@ skipping 96 matching lines @@
   std::string url_id_;
 
   BoundNetLog net_log_;
 
   DISALLOW_COPY_AND_ASSIGN(URLRequestThrottlerEntry);
 };
 
 }  // namespace net
 
 #endif  // NET_URL_REQUEST_URL_REQUEST_THROTTLER_ENTRY_H_