Make blink::ResourceRequest ctors explicit

third_party/WebKit/Source/platform/loader/fetch/ResourceRequest.h

 /*
  * Copyright (C) 2003, 2006 Apple Computer, Inc.  All rights reserved.
  * Copyright (C) 2006 Samuel Weinig <sam.weinig@gmail.com>
  * Copyright (C) 2009, 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
@@ skipping 57 matching lines @@
 
  public:
   enum class RedirectStatus { kFollowedRedirect, kNoRedirect };
 
   class ExtraData : public RefCounted<ExtraData> {
    public:
     virtual ~ExtraData() {}
   };
 
   ResourceRequest();
-  ResourceRequest(const String& url_string);
-  ResourceRequest(const KURL&);
+  explicit ResourceRequest(const String& url_string);
+  explicit ResourceRequest(const KURL&);
   explicit ResourceRequest(CrossThreadResourceRequestData*);
   ResourceRequest(const ResourceRequest&);
   ResourceRequest& operator=(const ResourceRequest&);
 
   // Gets a copy of the data suitable for passing to another thread.
   std::unique_ptr<CrossThreadResourceRequestData> CopyData() const;
 
   bool IsNull() const;
   bool IsEmpty() const;
 
@@ skipping 320 matching lines @@
   bool check_for_browser_side_navigation_;
   double ui_start_time_;
   bool is_external_request_;
   InputToLoadPerfMetricReportPolicy input_perf_metric_report_policy_;
   ResourceRequest::RedirectStatus redirect_status_;
 };
 
 }  // namespace blink
 
 #endif  // ResourceRequest_h