Remove explicit keyword from multi-argument constructors

net/url_request/url_request_throttler_entry.h

Index: net/url_request/url_request_throttler_entry.h
diff --git a/net/url_request/url_request_throttler_entry.h b/net/url_request/url_request_throttler_entry.h
index 75e6aa0c69efbb9f49c67697271ba7b27b5f38cb..10f1adc223be7f3b53b60ca98fe278282e3dc4f3 100644
--- a/net/url_request/url_request_throttler_entry.h
+++ b/net/url_request/url_request_throttler_entry.h
@@ -71,8 +71,8 @@ class NET_API URLRequestThrottlerEntry
   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.