[DevTools] Introduce EmulationModel which will encapsulate emulation

third_party/WebKit/Source/devtools/front_end/main/Main.js

Index: third_party/WebKit/Source/devtools/front_end/main/Main.js
diff --git a/third_party/WebKit/Source/devtools/front_end/main/Main.js b/third_party/WebKit/Source/devtools/front_end/main/Main.js
index 991a9be791109a4261719774e850bbcb1fdf5eec..fe21176a867e053d8beadc3a1374eedd5d822785 100644
--- a/third_party/WebKit/Source/devtools/front_end/main/Main.js
+++ b/third_party/WebKit/Source/devtools/front_end/main/Main.js
@@ -909,8 +909,6 @@ Main.BackendSettingsSync = class {
   constructor() {
     this._autoAttachSetting = Common.settings.moduleSetting('autoAttachToCreatedPages');
     this._autoAttachSetting.addChangeListener(this._update, this);
-    this._disableJavascriptSetting = Common.settings.moduleSetting('javaScriptDisabled');
-    this._disableJavascriptSetting.addChangeListener(this._update, this);
     SDK.targetManager.observeTargets(this, SDK.Target.Capability.Browser);
   }
 
@@ -919,7 +917,6 @@ Main.BackendSettingsSync = class {
    */
   _updateTarget(target) {
     target.pageAgent().setAutoAttachToCreatedPages(this._autoAttachSetting.get());
-    target.emulationAgent().setScriptExecutionDisabled(this._disableJavascriptSetting.get());
   }
 
   _update() {