[DevTools] Do not expose agents on Target

third_party/WebKit/Source/devtools/front_end/security/SecurityModel.js

Index: third_party/WebKit/Source/devtools/front_end/security/SecurityModel.js
diff --git a/third_party/WebKit/Source/devtools/front_end/security/SecurityModel.js b/third_party/WebKit/Source/devtools/front_end/security/SecurityModel.js
index 411c70d1d4da649b60617245bc608a863a8ddc72..d61e226223db7e2cd7dcbae89741dc42941de5f5 100644
--- a/third_party/WebKit/Source/devtools/front_end/security/SecurityModel.js
+++ b/third_party/WebKit/Source/devtools/front_end/security/SecurityModel.js
@@ -7,12 +7,12 @@
 Security.SecurityModel = class extends SDK.SDKModel {
   /**
    * @param {!SDK.Target} target
+   * @param {!Protocol.Dispatcher} dispatcher
    */
-  constructor(target) {
-    super(target);
-    this._dispatcher = new Security.SecurityDispatcher(this);
-    this._securityAgent = target.securityAgent();
-    target.registerSecurityDispatcher(this._dispatcher);
+  constructor(target, dispatcher) {
+    super(target, dispatcher);
+    this._securityAgent = dispatcher.securityAgent();
+    dispatcher.registerSecurityDispatcher(new Security.SecurityDispatcher(this));
     this._securityAgent.enable();
   }