DevTools: support resolving a UILocation to multiple raw script locations

third_party/WebKit/Source/devtools/front_end/bindings/CompilerScriptMapping.js

 /*
  * Copyright (C) 2012 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 132 matching lines @@
       return null;
     return uiSourceCode.uiLocation(
         /** @type {number} */ (entry.sourceLineNumber), /** @type {number} */ (entry.sourceColumnNumber));
   }
 
   /**
    * @override
    * @param {!Workspace.UISourceCode} uiSourceCode
    * @param {number} lineNumber
    * @param {number} columnNumber
-   * @return {?SDK.DebuggerModel.Location}
+   * @return {!Array<!SDK.DebuggerModel.Location>}
    */
-  uiLocationToRawLocation(uiSourceCode, lineNumber, columnNumber) {
+  uiLocationToRawLocations(uiSourceCode, lineNumber, columnNumber) {
     var script = uiSourceCode[Bindings.CompilerScriptMapping._scriptSymbol];
     if (!script)
-      return null;
+      return [];
     var sourceMap = this._sourceMapManager.sourceMapForClient(script);
     if (!sourceMap)
-      return null;
+      return [];
     var entry = sourceMap.firstSourceLineMapping(uiSourceCode.url(), lineNumber);

[dgozman, 2017/05/02 19:47:41]

We can actually return multiple here. Are you going to follow up?

     if (!entry)
-      return null;
-    return this._debuggerModel.createRawLocation(script, entry.lineNumber, entry.columnNumber);
+      return [];
+    var location = this._debuggerModel.createRawLocation(script, entry.lineNumber, entry.columnNumber);
+    return location ? [location] : [];
   }
 
   /**
    * @param {!Common.Event} event
    */
   _sourceMapWillAttach(event) {
     var script = /** @type {!SDK.Script} */ (event.data);
     // Create stub UISourceCode for the time source mapping is being loaded.
     this._addStubUISourceCode(script);
     this._debuggerWorkspaceBinding.pushSourceMapping(script, this);
@@ skipping 106 matching lines @@
   }
 
   dispose() {
     Common.EventTarget.removeEventListeners(this._eventListeners);
     this._stubProject.dispose();
   }
 };
 
 Bindings.CompilerScriptMapping._scriptSymbol = Symbol('Bindings.CompilerScriptMapping._scriptSymbol');
 Bindings.CompilerScriptMapping._frameIdSymbol = Symbol('Bindings.CompilerScriptMapping._frameIdSymbol');