DevTools: promisify ContentProvider.requestContent and all its clients.

third_party/WebKit/Source/devtools/front_end/network/NetworkLogView.js

 /*
  * Copyright (C) 2007, 2008 Apple Inc.  All rights reserved.
  * Copyright (C) 2008, 2009 Anthony Ricaud <rik@webkit.org>
  * Copyright (C) 2011 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
@@ skipping 1412 matching lines @@
     {
         /**
          * @param {?string} content
          */
         function callback(content)
         {
             if (request.contentEncoded)
                 content = request.asDataURL();
             InspectorFrontendHost.copyText(content || "");
         }
-        request.requestContent(callback);
+        request.requestContent().then(callback);
     },
 
     /**
      * @param {!WebInspector.NetworkRequest} request
      */
     _copyResponseHeaders: function(request)
     {
         InspectorFrontendHost.copyText(request.responseHeadersText);
     },
 
@@ skipping 723 matching lines @@
         return false;
     return true;
 }
 
 WebInspector.NetworkLogView.EventTypes = {
     RequestSelected: "RequestSelected",
     SearchCountUpdated: "SearchCountUpdated",
     SearchIndexUpdated: "SearchIndexUpdated",
     UpdateRequest: "UpdateRequest"
 };