DevTools: support sourceMappingURL for the inline stylesheets

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

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 /**
  * @unrestricted
  */
 SDK.CSSValue = class {
   /**
    * @param {!Protocol.CSS.Value} payload
    */
@@ skipping 72 matching lines @@
   isViaInspector() {
     return this.origin === Protocol.CSS.StyleSheetOrigin.Inspector;
   }
 
   /**
    * @return {boolean}
    */
   isRegular() {
     return this.origin === Protocol.CSS.StyleSheetOrigin.Regular;
   }
+
+  /**
+   * @return {!SDK.CSSModel}
+   */
+  cssModel() {
+    return this._cssModel;
+  }
 };
 
 /**
  * @unrestricted
  */
 SDK.CSSStyleRule = class extends SDK.CSSRule {
   /**
    * @param {!SDK.CSSModel} cssModel
    * @param {!Protocol.CSS.CSSRule} payload
    * @param {boolean=} wasUsed
@@ skipping 187 matching lines @@
   setKeyText(newKeyText) {
     var styleSheetId = this.styleSheetId;
     if (!styleSheetId)
       throw 'No rule stylesheet id';
     var range = this._keyText.range;
     if (!range)
       throw 'Keyframe key is not editable';
     return this._cssModel.setKeyframeKey(styleSheetId, range, newKeyText);
   }
 };