DevTools: fix rounding of scale 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 490 matching lines @@
      * @param {!Insets=} insets
      * @return {number}
      */
     _calculateFitScale: function(screenWidth, screenHeight, outline, insets)
     {
         var outlineWidth = outline ? outline.left + outline.right : 0;
         var outlineHeight = outline ? outline.top + outline.bottom : 0;
         var insetsWidth = insets ? insets.left + insets.right : 0;
         var insetsHeight = insets ? insets.top + insets.bottom : 0;
         var scale = Math.min(screenWidth ? this._preferredSize.width / (screenWidth + outlineWidth) : 1, screenHeight ? this._preferredSize.height / (screenHeight + outlineHeight) : 1);
-        scale = Math.min(Math.ceil(scale * 100), 100);
+        scale = Math.min(Math.floor(scale * 100), 100);
 
         var sharpScale = scale;
         while (sharpScale > scale * 0.7) {
             var sharp = true;
             if (screenWidth)
                 sharp = sharp && Number.isInteger((screenWidth - insetsWidth) * sharpScale / 100);
             if (screenHeight)
                 sharp = sharp && Number.isInteger((screenHeight - insetsHeight) * sharpScale / 100);
             if (sharp)
                 return sharpScale / 100;
@@ skipping 108 matching lines @@
 
     /**
      * @param {boolean} touchEnabled
      * @param {boolean} mobile
      */
     _applyTouch: function(touchEnabled, mobile)
     {
         WebInspector.MultitargetTouchModel.instance().setTouchEnabled(touchEnabled, mobile);
     }
 }