DevTools: promisify ContentProvider.requestContent and all its clients.

third_party/WebKit/Source/devtools/front_end/components/HandlerRegistry.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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 131 matching lines @@
         function save(forceSaveAs)
         {
             if (contentProvider instanceof WebInspector.UISourceCode) {
                 var uiSourceCode = /** @type {!WebInspector.UISourceCode} */ (contentProvider);
                 if (forceSaveAs)
                     uiSourceCode.saveAs();
                 else
                     uiSourceCode.commitWorkingCopy();
                 return;
             }
-            contentProvider.requestContent(doSave.bind(null, forceSaveAs));
+            contentProvider.requestContent().then(doSave.bind(null, forceSaveAs));
         }
 
         contextMenu.appendSeparator();
         contextMenu.appendItem(WebInspector.UIString("Save"), save.bind(null, false));
 
         if (contentProvider instanceof WebInspector.UISourceCode) {
             var uiSourceCode = /** @type {!WebInspector.UISourceCode} */ (contentProvider);
             if (uiSourceCode.project().type() !== WebInspector.projectTypes.FileSystem && uiSourceCode.project().type() !== WebInspector.projectTypes.Snippets)
                 contextMenu.appendItem(WebInspector.UIString.capitalize("Save ^as..."), save.bind(null, true));
         }
@@ skipping 153 matching lines @@
 
         var handlerSelector = new WebInspector.HandlerSelector(WebInspector.openAnchorLocationRegistry);
         return WebInspector.SettingsUI.createCustomSetting(WebInspector.UIString("Link handling:"), handlerSelector.element);
     }
 }
 
 /**
  * @type {!WebInspector.HandlerRegistry}
  */
 WebInspector.openAnchorLocationRegistry;