DevTools: support resolving a UILocation to multiple raw script locations

third_party/WebKit/Source/devtools/front_end/sources/SourceMapNamesResolver.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.
 Sources.SourceMapNamesResolver = {};
 
 Sources.SourceMapNamesResolver._cachedMapSymbol = Symbol('cache');
 Sources.SourceMapNamesResolver._cachedIdentifiersSymbol = Symbol('cachedIdentifiers');
 
 /**
  * @unrestricted
@@ skipping 233 matching lines @@
 
 /**
  * @param {!Workspace.UISourceCode} uiSourceCode
  * @param {number} lineNumber
  * @param {number} startColumnNumber
  * @param {number} endColumnNumber
  * @return {!Promise<string>}
  */
 Sources.SourceMapNamesResolver._resolveExpression = function(
     uiSourceCode, lineNumber, startColumnNumber, endColumnNumber) {
-  var rawLocation =
-      Bindings.debuggerWorkspaceBinding.uiLocationToRawLocation(uiSourceCode, lineNumber, startColumnNumber);
-  if (!rawLocation)
+  var rawLocations =
+      Bindings.debuggerWorkspaceBinding.uiLocationToRawLocations(uiSourceCode, lineNumber, startColumnNumber);
+  if (!rawLocations.length)
     return Promise.resolve('');
 
-  var script = rawLocation.script();
+  var script = rawLocations[0].script();
   if (!script)
     return Promise.resolve('');
   var sourceMap = Bindings.debuggerWorkspaceBinding.sourceMapForScript(script);
   if (!sourceMap)
     return Promise.resolve('');
 
   return script.requestContent().then(onContent);
 
   /**
    * @param {?string} content
@@ skipping 295 matching lines @@
   }
 
   /**
    * @override
    * @return {boolean}
    */
   isNode() {
     return this._object.isNode();
   }
 };