[DevTools] Do not expose agents on Target

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

Index: third_party/WebKit/Source/devtools/front_end/sdk/RuntimeModel.js
diff --git a/third_party/WebKit/Source/devtools/front_end/sdk/RuntimeModel.js b/third_party/WebKit/Source/devtools/front_end/sdk/RuntimeModel.js
index b0e1dbc5bf881f93960942b6dcf5350fe2262a76..ec002ede92e0d8f87b3ff031b809526bf828323a 100644
--- a/third_party/WebKit/Source/devtools/front_end/sdk/RuntimeModel.js
+++ b/third_party/WebKit/Source/devtools/front_end/sdk/RuntimeModel.js
@@ -34,12 +34,13 @@
 SDK.RuntimeModel = class extends SDK.SDKModel {
   /**
    * @param {!SDK.Target} target
+   * @param {!Protocol.Dispatcher} dispatcher
    */
-  constructor(target) {
-    super(target);
+  constructor(target, dispatcher) {
+    super(target, dispatcher);
 
-    this._agent = target.runtimeAgent();
-    this.target().registerRuntimeDispatcher(new SDK.RuntimeDispatcher(this));
+    this._agent = dispatcher.runtimeAgent();
+    dispatcher.registerRuntimeDispatcher(new SDK.RuntimeDispatcher(this));
     this._agent.enable();
     /** @type {!Map<number, !SDK.ExecutionContext>} */
     this._executionContextById = new Map();
@@ -170,7 +171,7 @@ SDK.RuntimeModel = class extends SDK.SDKModel {
   createRemoteObject(payload) {
     console.assert(typeof payload === 'object', 'Remote object payload should only be an object');
     return new SDK.RemoteObjectImpl(
-        this, payload.objectId, payload.type, payload.subtype, payload.value, payload.unserializableValue,
+        this, this._agent, payload.objectId, payload.type, payload.subtype, payload.value, payload.unserializableValue,
         payload.description, payload.preview, payload.customPreview);
   }
 
@@ -181,8 +182,8 @@ SDK.RuntimeModel = class extends SDK.SDKModel {
    */
   createScopeRemoteObject(payload, scopeRef) {
     return new SDK.ScopeRemoteObject(
-        this, payload.objectId, scopeRef, payload.type, payload.subtype, payload.value, payload.unserializableValue,
-        payload.description, payload.preview);
+        this, this._agent, payload.objectId, scopeRef, payload.type, payload.subtype, payload.value,
+        payload.unserializableValue, payload.description, payload.preview);
   }
 
   /**
@@ -205,7 +206,7 @@ SDK.RuntimeModel = class extends SDK.SDKModel {
       if (typeof unserializableValue !== 'undefined')
         value = undefined;
     }
-    return new SDK.RemoteObjectImpl(this, undefined, type, undefined, value, unserializableValue);
+    return new SDK.RemoteObjectImpl(this, this._agent, undefined, type, undefined, value, unserializableValue);
   }
 
   /**