[DevTools] Do not reset scroll when emulating device.

third_party/WebKit/Source/devtools/front_end/emulation/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 267 matching lines @@
 
     /**
      * @param {boolean} enabled
      */
     setEmulationEnabled: function(enabled)
     {
         if (this.canEmulate()) {
             this.settings._emulationEnabled.set(enabled);
             this.dispatchEventToListeners(WebInspector.OverridesSupport.Events.EmulationStateChanged);
             if (enabled && this.settings.emulateResolution.get())
-                this._target.emulationAgent().resetScrollAndPageScaleFactor();
+                this._target.emulationAgent().resetPageScaleFactor();
         }
     },
 
     /**
      * @param {!WebInspector.Target} target
      * @param {function()} callback
      */
     init: function(target, callback)
     {
         if (target.isPage())
@@ skipping 218 matching lines @@
     /**
      * @param {!WebInspector.Event} event
      */
     _onPageResizerFixedScaleRequested: function(event)
     {
         this._fixedDeviceScale = /** @type {boolean} */ (event.data);
         this._deviceMetricsChanged(false);
     },
 
     /**
-     * @param {boolean} resetScrollAndPageScale
+     * @param {boolean} resetPageScaleFactor
      */
-    _deviceMetricsChanged: function(resetScrollAndPageScale)
+    _deviceMetricsChanged: function(resetPageScaleFactor)
     {
         if (!this._initialized)
             return;
 
         this._showRulersChanged();
 
         if (this._deviceMetricsChangedListenerMuted)
             return;
 
         if (!this.emulationEnabled()) {
@@ skipping 52 matching lines @@
          * @this {WebInspector.OverridesSupport}
          * @return {!Promise.<?>}
          */
         function setDeviceMetricsOverride()
         {
             var setDevicePromise = this._target.emulationAgent().setDeviceMetricsOverride(
                 overrideWidth, overrideHeight, this.settings.emulateResolution.get() ? this.settings.deviceScaleFactor.get() : 0,
                 this.settings.emulateMobile.get(), this._pageResizer ? false : this.settings.deviceFitWindow.get(), scale, 0, 0,
                 screenWidth, screenHeight, positionX, positionY, apiCallback.bind(this))
             var allPromises = [ setDevicePromise ];
-            if (resetScrollAndPageScale)
-                allPromises.push(this._target.emulationAgent().resetScrollAndPageScaleFactor());
+            if (resetPageScaleFactor)
+                allPromises.push(this._target.emulationAgent().resetPageScaleFactor());
             return Promise.all(allPromises);
         }
 
         /**
          * @this {WebInspector.OverridesSupport}
          * @return {!Promise.<?>}
          */
         function clearDeviceMetricsOverride()
         {
             return this._target.emulationAgent().clearDeviceMetricsOverride(apiCallback.bind(this))
@@ skipping 197 matching lines @@
     },
 
     __proto__: WebInspector.Object.prototype
 }
 
 
 /**
  * @type {!WebInspector.OverridesSupport}
  */
 WebInspector.overridesSupport;