[DevTools] Show viewport size on resize by default, disable in device mode.

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.
 
 /**
  * @constructor
  * @param {function()} updateCallback
  * @implements {WebInspector.TargetManager.Observer}
  */
 WebInspector.DeviceModeModel = function(updateCallback)
@@ skipping 412 matching lines @@
             if (!screenHeight || screenHeight > this._preferredScaledHeight())
                 screenHeight = this._preferredScaledHeight();
             var mobile = this._uaSetting.get() === WebInspector.DeviceModeModel.UA.Mobile || this._uaSetting.get() === WebInspector.DeviceModeModel.UA.MobileNoTouch;
             var defaultDeviceScaleFactor = mobile ? WebInspector.DeviceModeModel.defaultMobileScaleFactor : 0;
             this._fitScale = this._calculateFitScale(this._widthSetting.get(), this._heightSetting.get());
             this._appliedUserAgentType = this._uaSetting.get();
             this._applyDeviceMetrics(new Size(screenWidth, screenHeight), new Insets(0, 0, 0, 0), this._scaleSetting.get(), this._deviceScaleFactorSetting.get() || defaultDeviceScaleFactor, mobile, screenHeight >= screenWidth ? "portraitPrimary" : "landscapePrimary", resetPageScaleFactor);
             this._applyUserAgent(mobile ? WebInspector.DeviceModeModel._defaultMobileUserAgent : "");
             this._applyTouch(this._uaSetting.get() === WebInspector.DeviceModeModel.UA.DesktopTouch || this._uaSetting.get() === WebInspector.DeviceModeModel.UA.Mobile, this._uaSetting.get() === WebInspector.DeviceModeModel.UA.Mobile);
         }
+        if (this._target)
+            this._target.renderingAgent().setShowViewportSizeOnResize(this._type === WebInspector.DeviceModeModel.Type.None);
         this._updateCallback.call(null);
     },
 
     /**
      * @param {number} screenWidth
      * @param {number} screenHeight
      * @return {number}
      */
     _calculateFitScale: function(screenWidth, screenHeight)
     {
@@ skipping 100 matching lines @@
 
     /**
      * @param {boolean} touchEnabled
      * @param {boolean} mobile
      */
     _applyTouch: function(touchEnabled, mobile)
     {
         WebInspector.MultitargetTouchModel.instance().setTouchEnabled(touchEnabled, mobile);
     }
 }