[DevTools] Do not expose agents on Target

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

Index: third_party/WebKit/Source/devtools/front_end/sdk/OverlayModel.js
diff --git a/third_party/WebKit/Source/devtools/front_end/sdk/OverlayModel.js b/third_party/WebKit/Source/devtools/front_end/sdk/OverlayModel.js
index de8d729d55e8c8f62638608a805b6f92e7e7e682..542c5f7ae424c98331580464f580b39e4a5facb8 100644
--- a/third_party/WebKit/Source/devtools/front_end/sdk/OverlayModel.js
+++ b/third_party/WebKit/Source/devtools/front_end/sdk/OverlayModel.js
@@ -8,13 +8,14 @@
 SDK.OverlayModel = class extends SDK.SDKModel {
   /**
    * @param {!SDK.Target} target
+   * @param {!Protocol.Dispatcher} dispatcher
    */
-  constructor(target) {
-    super(target);
+  constructor(target, dispatcher) {
+    super(target, dispatcher);
     this._domModel = /** @type {!SDK.DOMModel} */ (target.model(SDK.DOMModel));
 
-    target.registerOverlayDispatcher(this);
-    this._overlayAgent = target.overlayAgent();
+    dispatcher.registerOverlayDispatcher(this);
+    this._overlayAgent = dispatcher.overlayAgent();
     this._overlayAgent.enable();
     this._overlayAgent.setShowViewportSizeOnResize(true);