Revert of [DevTools] Consolidate overlay-related functionality in Overlay domain

third_party/WebKit/Source/devtools/front_end/emulation/DeviceModeModel.js

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 /**
  * @implements {SDK.TargetManager.Observer}
  * @unrestricted
  */
 Emulation.DeviceModeModel = class {
   /**
    * @param {function()} updateCallback
@@ skipping 454 matching lines @@
           this._scaleSetting.get(), this._deviceScaleFactorSetting.get() || defaultDeviceScaleFactor, mobile,
           screenHeight >= screenWidth ? Protocol.Emulation.ScreenOrientationType.PortraitPrimary :
                                         Protocol.Emulation.ScreenOrientationType.LandscapePrimary,
           resetPageScaleFactor);
       this._applyUserAgent(mobile ? Emulation.DeviceModeModel._defaultMobileUserAgent : '');
       this._applyTouch(
           this._uaSetting.get() === Emulation.DeviceModeModel.UA.DesktopTouch ||
               this._uaSetting.get() === Emulation.DeviceModeModel.UA.Mobile,
           this._uaSetting.get() === Emulation.DeviceModeModel.UA.Mobile);
     }
-    var overlayModel = this._target ? this._target.model(SDK.OverlayModel) : null;
-    if (overlayModel)
-      overlayModel.setShowViewportSizeOnResize(this._type === Emulation.DeviceModeModel.Type.None);
+    if (this._target)
+      this._target.renderingAgent().setShowViewportSizeOnResize(this._type === Emulation.DeviceModeModel.Type.None);
     this._updateCallback.call(null);
   }
 
   /**
    * @param {number} screenWidth
    * @param {number} screenHeight
    * @param {!UI.Insets=} outline
    * @param {!UI.Insets=} insets
    * @return {number}
    */
@@ skipping 208 matching lines @@
 
 Emulation.DeviceModeModel.MinDeviceSize = 50;
 Emulation.DeviceModeModel.MaxDeviceSize = 9999;
 
 
 Emulation.DeviceModeModel._defaultMobileUserAgent =
     'Mozilla/5.0 (Linux; Android 6.0; Nexus 5 Build/MRA58N) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/%s Mobile Safari/537.36';
 Emulation.DeviceModeModel._defaultMobileUserAgent =
     SDK.MultitargetNetworkManager.patchUserAgentWithChromeVersion(Emulation.DeviceModeModel._defaultMobileUserAgent);
 Emulation.DeviceModeModel.defaultMobileScaleFactor = 2;