[Devtools] Lazily build reverse mappings

third_party/WebKit/Source/devtools/front_end/sources/JavaScriptBreakpointsSidebarPane.js

 // Copyright (c) 2015 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.
 
 /**
  * @constructor
  * @extends {WebInspector.VBox}
  * @implements {WebInspector.ContextFlavorListener}
  */
 WebInspector.JavaScriptBreakpointsSidebarPane = function()
@@ skipping 79 matching lines @@
         {
             var lineNumber = uiLocation.lineNumber
             var columnNumber = uiLocation.columnNumber;
             var text = new WebInspector.Text(content || "");
             if (lineNumber < text.lineCount()) {
                 var lineText = text.lineAt(lineNumber);
                 var maxSnippetLength = 200;
                 var snippetStartIndex = columnNumber > 100 ? columnNumber : 0;
                 snippetElement.textContent = lineText.substr(snippetStartIndex).trimEnd(maxSnippetLength);
             }
-            this.didReceiveBreakpointLineForTest(uiLocation.uiSourceCode);
+            this.didReceiveBreakpointLineForTest(uiLocation.uiSourceCode, lineNumber,  columnNumber);
         }
 
         uiLocation.uiSourceCode.requestContent().then(didRequestContent.bind(this));
 
         element._data = uiLocation;
         var currentElement = this._listElement.firstChild;
         while (currentElement) {
             if (currentElement._data && this._compareBreakpoints(currentElement._data, element._data) > 0)
                 break;
             currentElement = currentElement.nextSibling;
         }
         this._addListElement(element, currentElement);
 
         var breakpointItem = { element: element, checkbox: checkboxLabel.checkboxElement };
         this._items.set(breakpoint, breakpointItem);
     },
 
     /**
      * @param {!WebInspector.UISourceCode} uiSourceCode
+     * @param {number} lineNumber
+     * @param {number} columnNumber
      */
-    didReceiveBreakpointLineForTest: function(uiSourceCode)
+    didReceiveBreakpointLineForTest: function(uiSourceCode, lineNumber, columnNumber)
     {
     },
 
     /**
      * @param {!WebInspector.Event} event
      */
     _breakpointRemoved: function(event)
     {
         var breakpoint = /** @type {!WebInspector.BreakpointManager.Breakpoint} */ (event.data.breakpoint);
         var breakpointItem = this._items.get(breakpoint);
@@ skipping 134 matching lines @@
         this._listElement.removeChildren();
         if (this._listElement.parentElement) {
             this.element.removeChild(this._listElement);
             this.element.appendChild(this.emptyElement);
         }
         this._items.clear();
     },
 
     __proto__: WebInspector.VBox.prototype
 }