[AppRemoting] Implement ConnectionDroppedDialog.

remoting/webapp/base/js/window_shape.js

 // Copyright 2014 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.
 
 /**
  * @fileoverview
  * Class handling setting of the local app window shape to account for windows
  * on the remote desktop, as well as any client-side UI.
  */
 
@@ skipping 72 matching lines @@
       desktop.right = Math.max(rect.left + rect.width, desktop.right);
       desktop.top = Math.min(rect.top, desktop.top);
       desktop.bottom = Math.max(rect.top + rect.height, desktop.bottom);
     });
   }
 
   // Center the element to the desktop window bounding rect.
   var rect = element.getBoundingClientRect();
   var left = (desktop.right - desktop.left - rect.width) / 2 + desktop.left;
   var top = (desktop.bottom - desktop.top - rect.height) / 2 + desktop.top;
-  element.style.left = left + 'px';
-  element.style.top = top + 'px';
+  element.style.left = Math.round(left) + 'px';
+  element.style.top = Math.round(top) + 'px';
   this.updateClientWindowShape();
 };
 
 /**
  * Sets the region associated with the remote desktop windows.
  *
  * @param {Array<{left: number, top: number, width: number, height: number}>}
  *     rects
  */
 remoting.WindowShape.prototype.setDesktopRects = function(rects) {
@@ skipping 38 matching lines @@
  * Adds the context menu's bounding rectangle to the specified region.
  *
  * @param {Array<{left: number, top: number, width: number, height: number}>}
  *     rects
  */
 remoting.WindowShape.ClientUI.prototype.addToRegion = function(rects) {};
 
 
 /** @type {remoting.WindowShape} */
 remoting.windowShape = new remoting.WindowShape();