[DevTools] Remove Common.Event.target field.

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

 // Copyright 2014 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.
 /**
  * @implements {SDK.TargetManager.Observer}
  * @unrestricted
  */
 Bindings.DebuggerWorkspaceBinding = class {
   /**
    * @param {!SDK.TargetManager} targetManager
@@ skipping 243 matching lines @@
     var targetData = this._targetToData.get(script.target());
     if (!targetData)
       return;
     targetData._compilerMapping.maybeLoadSourceMap(script);
   }
 
   /**
    * @param {!Common.Event} event
    */
   _globalObjectCleared(event) {
-    var debuggerModel = /** @type {!SDK.DebuggerModel} */ (event.target);
+    var debuggerModel = /** @type {!SDK.DebuggerModel} */ (event.data);
     this._reset(debuggerModel.target());
   }
 
   /**
    * @param {!SDK.Target} target
    */
   _reset(target) {
     var targetData = this._targetToData.get(target);
     targetData.callFrameLocations.valuesArray().forEach((location) => this._removeLiveLocation(location));
     targetData.callFrameLocations.clear();
@@ skipping 40 matching lines @@
   _removeLiveLocation(location) {
     var info = this._infoForScript(location._script.target(), location._script.scriptId);
     if (info)
       info._removeLocation(location);
   }
 
   /**
    * @param {!Common.Event} event
    */
   _debuggerResumed(event) {
-    var debuggerModel = /** @type {!SDK.DebuggerModel} */ (event.target);
+    var debuggerModel = /** @type {!SDK.DebuggerModel} */ (event.data);
     this._reset(debuggerModel.target());
   }
 };
 
 /**
  * @unrestricted
  */
 Bindings.DebuggerWorkspaceBinding.TargetData = class {
   /**
    * @param {!SDK.DebuggerModel} debuggerModel
@@ skipping 52 matching lines @@
    */
   _setSourceMapping(uiSourceCode, sourceMapping) {
     if (this._uiSourceCodeToSourceMapping.get(uiSourceCode) === sourceMapping)
       return;
 
     if (sourceMapping)
       this._uiSourceCodeToSourceMapping.set(uiSourceCode, sourceMapping);
     else
       this._uiSourceCodeToSourceMapping.remove(uiSourceCode);
 
-    uiSourceCode.dispatchEventToListeners(
-        Workspace.UISourceCode.Events.SourceMappingChanged,
-        {target: this._debuggerModel.target(), isIdentity: sourceMapping ? sourceMapping.isIdentity() : false});
+    uiSourceCode.dispatchEventToListeners(Workspace.UISourceCode.Events.SourceMappingChanged, {
+      uiSourceCode: uiSourceCode,
+      target: this._debuggerModel.target(),
+      isIdentity: sourceMapping ? sourceMapping.isIdentity() : false
+    });
   }
 
   /**
    * @param {!Workspace.UISourceCode} uiSourceCode
    * @param {number} lineNumber
    * @param {number} columnNumber
    * @return {?SDK.DebuggerModel.Location}
    */
   _uiLocationToRawLocation(uiSourceCode, lineNumber, columnNumber) {
     var sourceMapping = this._uiSourceCodeToSourceMapping.get(uiSourceCode);
@@ skipping 234 matching lines @@
    * @param {number} lineNumber
    * @return {boolean}
    */
   uiLineHasMapping(uiSourceCode, lineNumber) {}
 };
 
 /**
  * @type {!Bindings.DebuggerWorkspaceBinding}
  */
 Bindings.debuggerWorkspaceBinding;