DevTools: promisify ContentProvider.requestContent and all its clients.

third_party/WebKit/Source/devtools/front_end/sources/SourcesSearchScope.js

 /*
  * 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
  * notice, this list of conditions and the following disclaimer.
  *
@@ skipping 212 matching lines @@
             else
                 uiSourceCode.checkContentUpdated(true, contentUpdated.bind(this, uiSourceCode));
         }
 
         /**
          * @param {!WebInspector.UISourceCode} uiSourceCode
          * @this {WebInspector.SourcesSearchScope}
          */
         function contentUpdated(uiSourceCode)
         {
-            uiSourceCode.requestContent(contentLoaded.bind(this, uiSourceCode));
+            uiSourceCode.requestContent().then(contentLoaded.bind(this, uiSourceCode));
         }
 
         /**
          * @this {WebInspector.SourcesSearchScope}
          */
         function scheduleSearchInNextFileOrFinish()
         {
             if (fileIndex >= files.length) {
                 if (!callbacksLeft) {
                     progress.done();
@@ skipping 54 matching lines @@
     /**
      * @override
      * @param {!WebInspector.ProjectSearchConfig} searchConfig
      * @return {!WebInspector.FileBasedSearchResultsPane}
      */
     createSearchResultsPane: function(searchConfig)
     {
         return new WebInspector.FileBasedSearchResultsPane(searchConfig);
     }
 }