DevTools: promisify ContentProvider.requestContent and all its clients.

third_party/WebKit/Source/devtools/front_end/sdk/CSSStyleModel.js

 /*
  * Copyright (C) 2010 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 1889 matching lines @@
             return text;
         var sourceURLLine = text.substr(sourceURLLineIndex + 1).split("\n", 1)[0];
         var sourceURLRegex = /[\040\t]*\/\*# sourceURL=[\040\t]*([^\s]*)[\040\t]*\*\/[\040\t]*$/;
         if (sourceURLLine.search(sourceURLRegex) === -1)
             return text;
         return text.substr(0, sourceURLLineIndex) + text.substr(sourceURLLineIndex + sourceURLLine.length + 1);
     },
 
     /**
      * @override
-     * @param {function(string)} userCallback
+     * @return {!Promise<?string>}
      */
-    requestContent: function(userCallback)
+    requestContent: function()
     {
-        this._cssModel._agent.getStyleSheetText(this.id, textCallback.bind(this))
-            .catchException("")
-            .then(userCallback)
+        return this._cssModel._agent.getStyleSheetText(this.id, textCallback.bind(this))
+            .catchException(/** @type {?string} */(""));
 
         /**
          * @param {?Protocol.Error} error
          * @param {?string} text
          * @return {string}
          * @this {WebInspector.CSSStyleSheetHeader}
          */
         function textCallback(error, text)
         {
             if (error || text === null) {
                 WebInspector.console.error("Failed to get text for stylesheet " + this.id + ": " + error)
                 text = "";
                 // Fall through.
             }
             return this._trimSourceURL(text);
         }
     },
 
     /**
      * @override
      */
     searchInContent: function(query, caseSensitive, isRegex, callback)
     {
         function performSearch(content)
         {
             callback(WebInspector.ContentProvider.performSearchInContent(content, query, caseSensitive, isRegex));
         }
 
         // searchInContent should call back later.
-        this.requestContent(performSearch);
+        this.requestContent().then(performSearch);
     },
 
     /**
      * @param {string} newText
      * @return {!Promise.<?Protocol.Error>}
      */
     _setContentPromise: function(newText)
     {
         newText = this._trimSourceURL(newText);
         if (this.hasSourceURL)
@@ skipping 464 matching lines @@
  * @constructor
  * @param {?WebInspector.CSSStyleDeclaration} inlineStyle
  * @param {?WebInspector.CSSStyleDeclaration} attributesStyle
  */
 WebInspector.CSSStyleModel.InlineStyleResult = function(inlineStyle, attributesStyle)
 {
     this.inlineStyle = inlineStyle;
     this.attributesStyle = attributesStyle;
 }