DevTools: support UISourceCode rename in automapping

third_party/WebKit/LayoutTests/http/tests/inspector/isolated-filesystem-test.js

 var initialize_IsolatedFileSystemTest = function() {
 
 InspectorFrontendHost.isolatedFileSystem = function(name)
 {
     return InspectorTest.TestFileSystem._instances[name];
 }
 
 InspectorTest.TestFileSystem = function(fileSystemPath)
 {
     this.root = new InspectorTest.TestFileSystem.Entry(this, "", true, null);
@@ skipping 196 matching lines @@
     {
         success({
             modificationTime: new Date(this._timestamp),
             size: this.isDirectory ? 0 : this.content.size
         });
     },
 
     moveTo: function(parent, newName, callback, errorCallback)
     {
         this._parent._children.remove(this);
+        delete this._parent._childrenMap[this.name]
         this._parent = parent;
         this._parent._children.push(this);
         this.name = newName;
+        this._parent._childrenMap[this.name] = this;
         callback(this);
     },
 
     getParent: function(callback, errorCallback)
     {
         callback(this._parent);
     }
 }
 
 InspectorTest.TestFileSystem.Reader = function(children)
@@ skipping 28 matching lines @@
     truncate: function(num)
     {
         this._entry._timestamp += this._modificationTimesDelta;
         this._entry.content = this._entry.content.slice(0, num);
         if (this.onwriteend)
             this.onwriteend();
     }
 }
 
 };