[DevTools] Introduce EmulationModel which will encapsulate emulation

third_party/WebKit/Source/devtools/front_end/main/module.json

 {
     "extensions": [
         {
             "type": "@Common.AppProvider",
             "className": "Main.SimpleAppProvider",
             "order": 10
         },
         {
             "type": "@UI.ContextMenu.Provider",
             "contextTypes": [
@@ skipping 229 matching lines @@
                     "title": "Disable cache (while DevTools is open)"
                 },
                 {
                     "value": false,
                     "title": "Enable cache"
                 }
             ]
         },
         {
             "type": "setting",
-            "category": "Debugger",
-            "title": "Disable JavaScript",
-            "settingName": "javaScriptDisabled",
-            "settingType": "boolean",
-            "storageType": "session",
-            "order": 1,
-            "defaultValue": false,
-            "options": [
-                {
-                    "value": true,
-                    "title": "Disable JavaScript"
-                },
-                {
-                    "value": false,
-                    "title": "Enable JavaScript"
-                }
-            ]
-        },
-        {
-            "type": "setting",
             "category": "DevTools",
             "title": "Auto-open DevTools for popups",
             "settingName": "autoAttachToCreatedPages",
             "settingType": "boolean",
             "order": 2,
             "defaultValue": false,
             "options": [
                 {
                     "value": true,
                     "title": "Auto-open DevTools for popups"
@@ skipping 175 matching lines @@
         "ExecutionContextSelector.js",
         "Main.js"
     ],
     "resources": [
         "errorWarningCounter.css",
         "remoteDebuggingTerminatedScreen.css",
         "renderingOptions.css",
         "targetCrashedScreen.css"
     ]
 }