DevTools: explicitly control support for viewport meta tag so that desktop emulation was possible

Source/devtools/front_end/OverridesSupport.js

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 24 matching lines @@
 WebInspector.OverridesSupport = function()
 {
     this._canForceCompositingMode = null;
     WebInspector.resourceTreeModel.addEventListener(WebInspector.ResourceTreeModel.EventTypes.MainFrameNavigated, this.updateCanForceCompositingMode.bind(this, null), this);
 
     WebInspector.settings.overrideUserAgent.addChangeListener(this._userAgentChanged, this);
     WebInspector.settings.userAgent.addChangeListener(this._userAgentChanged, this);
 
     WebInspector.settings.overrideDeviceMetrics.addChangeListener(this._deviceMetricsChanged, this);
     WebInspector.settings.deviceMetrics.addChangeListener(this._deviceMetricsChanged, this);
+    WebInspector.settings.emulateViewport.addChangeListener(this._deviceMetricsChanged, this);
     WebInspector.settings.deviceFitWindow.addChangeListener(this._deviceMetricsChanged, this);
 
     WebInspector.settings.overrideGeolocation.addChangeListener(this._geolocationPositionChanged, this);
     WebInspector.settings.geolocationOverride.addChangeListener(this._geolocationPositionChanged, this);
 
     WebInspector.settings.overrideDeviceOrientation.addChangeListener(this._deviceOrientationChanged, this);
     WebInspector.settings.deviceOrientationOverride.addChangeListener(this._deviceOrientationChanged, this);
 
     WebInspector.settings.emulateTouchEvents.addChangeListener(this._emulateTouchEventsChanged, this);
 
@@ skipping 347 matching lines @@
      * @param {string} deviceMetrics
      * @param {string} userAgent
      */
     emulateDevice: function(deviceMetrics, userAgent)
     {
         WebInspector.settings.deviceMetrics.set(deviceMetrics);
         WebInspector.settings.userAgent.set(userAgent);
         WebInspector.settings.overrideDeviceMetrics.set(true);
         WebInspector.settings.overrideUserAgent.set(true);
         WebInspector.settings.emulateTouchEvents.set(true);
+        WebInspector.settings.emulateViewport.set(true);
     },
 
     reset: function()
     {
         WebInspector.settings.overrideDeviceMetrics.set(false);
         WebInspector.settings.overrideUserAgent.set(false);
         WebInspector.settings.emulateTouchEvents.set(false);
         WebInspector.settings.overrideDeviceOrientation.set(false);
         WebInspector.settings.overrideGeolocation.set(false);
         WebInspector.settings.overrideCSSMedia.set(false);
+        WebInspector.settings.emulateViewport.set(false);
     },
 
     applyInitialOverrides: function()
     {
         if (this._anyOverrideIsEnabled())
             this.updateCanForceCompositingMode(this._updateAllOverrides.bind(this));
         else
             this._updateAllOverrides();
     },
 
@@ skipping 13 matching lines @@
         this.dispatchEventToListeners(WebInspector.OverridesSupport.Events.OverridesEnabledButImpossibleChanged);
     },
 
     _deviceMetricsChanged: function()
     {
         var metrics = WebInspector.OverridesSupport.DeviceMetrics.parseSetting(WebInspector.settings.overrideDeviceMetrics.get() && this._canForceCompositingMode ? WebInspector.settings.deviceMetrics.get() : "");
         if (metrics.isValid()) {
             var active = metrics.width > 0 && metrics.height > 0;
             var dipWidth = Math.round(metrics.width / metrics.deviceScaleFactor);
             var dipHeight = Math.round(metrics.height / metrics.deviceScaleFactor);
-            PageAgent.setDeviceMetricsOverride(dipWidth, dipHeight, metrics.deviceScaleFactor, WebInspector.settings.deviceFitWindow.get(), metrics.textAutosizing, metrics.fontScaleFactor);
+            PageAgent.setDeviceMetricsOverride(dipWidth, dipHeight, metrics.deviceScaleFactor, WebInspector.settings.emulateViewport.get(), WebInspector.settings.deviceFitWindow.get(), metrics.textAutosizing, metrics.fontScaleFactor);
         }
         this._revealOverridesTabIfNeeded();
         this.dispatchEventToListeners(WebInspector.OverridesSupport.Events.OverridesEnabledButImpossibleChanged);
     },
 
     _geolocationPositionChanged: function()
     {
         if (!WebInspector.settings.overrideGeolocation.get() || !this._canForceCompositingMode) {
             PageAgent.clearGeolocationOverride();
             return;
@@ skipping 71 matching lines @@
     },
 
     __proto__: WebInspector.Object.prototype
 }
 
 
 /**
  * @type {WebInspector.OverridesSupport}
  */
 WebInspector.overridesSupport;