DevTools: promisify ContentProvider.requestContent and all its clients.

third_party/WebKit/Source/devtools/front_end/source_frame/ImageView.js

 /*
  * Copyright (C) 2007, 2008 Apple 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.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 53 matching lines @@
     _createContentIfNeeded: function()
     {
         if (this._container)
             return;
 
         this._container = this.element.createChild("div", "image");
         var imagePreviewElement = this._container.createChild("img", "resource-image-view");
         imagePreviewElement.addEventListener("contextmenu", this._contextMenu.bind(this), true);
         WebInspector.Resource.populateImageSource(this._url, this._mimeType, this._contentProvider, imagePreviewElement);
 
-        this._contentProvider.requestContent(onContentAvailable.bind(this));
+        this._contentProvider.requestContent().then(onContentAvailable.bind(this));
 
         /**
          * @param {?string} content
          * @this {WebInspector.ImageView}
          */
         function onContentAvailable(content)
         {
             this._sizeLabel.setText(Number.bytesToString(this._base64ToSize(content)));
             this._dimensionsLabel.setText(WebInspector.UIString("%d × %d", imagePreviewElement.naturalWidth, imagePreviewElement.naturalHeight));
         }
@@ skipping 36 matching lines @@
         InspectorFrontendHost.copyText(this._url);
     },
 
     _openInNewTab: function()
     {
         InspectorFrontendHost.openInNewTab(this._url);
     },
 
     __proto__: WebInspector.VBoxWithToolbarItems.prototype
 }