DevTools: Use live location for line level profile presentation.

third_party/WebKit/Source/devtools/front_end/workspace/UISourceCode.js

 /*
  * Copyright (C) 2011 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 34 matching lines @@
     var pathComponents = WebInspector.ParsedURL.splitURLIntoPathComponents(url);
     this._origin = pathComponents[0];
     this._parentURL = pathComponents.slice(0, -1).join("/");
     this._name = pathComponents[pathComponents.length - 1];
 
     this._contentType = contentType;
     /** @type {?function(?string)} */
     this._requestContentCallback = null;
     /** @type {?Promise<?string>} */
     this._requestContentPromise = null;
-    /** @type {!Map<string, !Array<!WebInspector.UISourceCode.LineMarker>>} */
+    /** @type {!Map<string, !Map<number, !WebInspector.UISourceCode.LineMarker>>} */
     this._lineDecorations = new Map();
 
     /** @type {!Array.<!WebInspector.Revision>} */
     this.history = [];
     this._hasUnsavedCommittedChanges = false;
 
     /** @type {!Array<!WebInspector.UISourceCode.Message>} */
     this._messages = [];
 }
 
@@ skipping 584 matching lines @@
 
     /**
      * @param {number} lineNumber
      * @param {string} type
      * @param {?} data
      */
     addLineDecoration: function(lineNumber, type, data)
     {
         var markers = this._lineDecorations.get(type);
         if (!markers) {
-            markers = [];
+            markers = new Map();
             this._lineDecorations.set(type, markers);
         }
         var marker = new WebInspector.UISourceCode.LineMarker(lineNumber, type, data);
-        markers.push(marker);
+        markers.set(lineNumber, marker);
         this.dispatchEventToListeners(WebInspector.UISourceCode.Events.LineDecorationAdded, marker);
     },
 
     /**
+     * @param {number} lineNumber
+     * @param {string} type
+     */
+    removeLineDecoration: function(lineNumber, type)
+    {
+        var markers = this._lineDecorations.get(type);
+        if (!markers)
+            return;
+        var marker = markers.get(lineNumber);
+        if (!marker)
+            return;
+        markers.delete(lineNumber);
+        this.dispatchEventToListeners(WebInspector.UISourceCode.Events.LineDecorationRemoved, marker);
+        if (!markers.size)
+            this._lineDecorations.delete(type);
+    },
+
+    /**
      * @param {string} type
      */
     removeAllLineDecorations: function(type)
     {
-        var markers = this._lineDecorations.get(type) || [];
-        markers.forEach(this.dispatchEventToListeners.bind(this, WebInspector.UISourceCode.Events.LineDecorationRemoved));
+        var markers = this._lineDecorations.get(type);
+        if (!markers)
+            return;
         this._lineDecorations.delete(type);
+        markers.forEach(marker => {
+            this.dispatchEventToListeners(WebInspector.UISourceCode.Events.LineDecorationRemoved, marker);
+        });
     },
 
     /**
      * @param {string} type
-     * @return {?Array<!WebInspector.UISourceCode.LineMarker>}
+     * @return {?Map<number, !WebInspector.UISourceCode.LineMarker>}
      */
     lineDecorations: function(type)
     {
         return this._lineDecorations.get(type) || null;
     },
 
     __proto__: WebInspector.Object.prototype
 }
 
 /**
@@ skipping 253 matching lines @@
     },
 
     /**
      * @return {*}
      */
     data: function()
     {
         return this._data;
     }
 }