[DevTools] Do not expose agents on Target

third_party/WebKit/Source/devtools/front_end/sdk/HeapProfilerModel.js

 /**
  * @unrestricted
  */
 SDK.HeapProfilerModel = class extends SDK.SDKModel {
   /**
    * @param {!SDK.Target} target
+   * @param {!Protocol.Dispatcher} dispatcher
    */
-  constructor(target) {
-    super(target);
-    target.registerHeapProfilerDispatcher(new SDK.HeapProfilerDispatcher(this));
+  constructor(target, dispatcher) {
+    super(target, dispatcher);
+    dispatcher.registerHeapProfilerDispatcher(new SDK.HeapProfilerDispatcher(this));
     this._enabled = false;
-    this._heapProfilerAgent = target.heapProfilerAgent();
+    this._heapProfilerAgent = dispatcher.heapProfilerAgent();
     this._runtimeModel = /** @type {!SDK.RuntimeModel} */ (target.model(SDK.RuntimeModel));
   }
 
   /**
    * @return {!SDK.DebuggerModel}
    */
   debuggerModel() {
     return this._runtimeModel.debuggerModel();
   }
 
@@ skipping 178 matching lines @@
     this._heapProfilerModel.reportHeapSnapshotProgress(done, total, finished);
   }
 
   /**
    * @override
    */
   resetProfiles() {
     this._heapProfilerModel.resetProfiles();
   }
 };