Revert of 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 {!Array<!SDK.DebuggerModel.Location>}
+   * @return {?SDK.DebuggerModel.Location}
    */
-  uiLocationToRawLocations(uiSourceCode, lineNumber, columnNumber) {
+  uiLocationToRawLocation(uiSourceCode, lineNumber, columnNumber) {
     var script = uiSourceCode[Bindings.CompilerScriptMapping._scriptSymbol];
-    var sourceMap = script && this._sourceMapManager.sourceMapForClient(script);
+    if (!script)
+      return null;
+    var sourceMap = this._sourceMapManager.sourceMapForClient(script);
     if (!sourceMap)
-      return [];
-    return sourceMap.mappingsForLine(uiSourceCode.url(), lineNumber)
-        .map(entry => this._debuggerModel.createRawLocation(script, entry.lineNumber, entry.columnNumber))
-        .filter(location => !!location);
+      return null;
+    var entry = sourceMap.firstSourceLineMapping(uiSourceCode.url(), lineNumber);
+    if (!entry)
+      return null;
+    return this._debuggerModel.createRawLocation(script, entry.lineNumber, entry.columnNumber);
   }
 
   /**
    * @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 95 matching lines @@
    * @override
    * @param {!Workspace.UISourceCode} uiSourceCode
    * @param {number} lineNumber
    * @return {boolean}
    */
   uiLineHasMapping(uiSourceCode, lineNumber) {
     var script = uiSourceCode[Bindings.CompilerScriptMapping._scriptSymbol];
     var sourceMap = script ? this._sourceMapManager.sourceMapForClient(script) : null;
     if (!sourceMap)
       return true;
-    return sourceMap.mappingsForLine(uiSourceCode.url(), lineNumber).length > 0;
+    return !!sourceMap.firstSourceLineMapping(uiSourceCode.url(), lineNumber);
   }
 
   dispose() {
     Common.EventTarget.removeEventListeners(this._eventListeners);
     this._stubProject.dispose();
   }
 };
 
 Bindings.CompilerScriptMapping._scriptSymbol = Symbol('Bindings.CompilerScriptMapping._scriptSymbol');
 Bindings.CompilerScriptMapping._frameIdSymbol = Symbol('Bindings.CompilerScriptMapping._frameIdSymbol');