Pass the size to the RenderView on creation.

chrome/test/data/extensions/platform_apps/web_view/shim/main.js

 // Copyright (c) 2012 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.
 
 var util = {};
 var embedder = {};
 embedder.baseGuestURL = '';
 embedder.emptyGuestURL = '';
 embedder.windowOpenGuestURL = '';
 embedder.noReferrerGuestURL = '';
@@ skipping 122 matching lines @@
   webview.autosize = true;
   webview.minwidth = 200;
   webview.maxwidth = 210;
   webview.minheight = 40;
   webview.maxheight = 200;
 
   var step = 1;
   webview.addEventListener('sizechanged', function(e) {
     switch (step) {
       case 1:
-        embedder.test.assertEq(0, e.oldHeight);
         embedder.test.assertEq(200, e.newHeight);
         // Change the maxheight to verify that we see the change.
         webview.maxheight = 50;
         break;
       case 2:
         embedder.test.assertEq(200, e.oldHeight);
         embedder.test.assertEq(50, e.newHeight);
         embedder.test.succeed();
         break;
       default:
@@ skipping 1906 matching lines @@
   'testFindAPI_findupdate': testFindAPI,
   'testLoadDataAPI': testLoadDataAPI
 };
 
 onload = function() {
   chrome.test.getConfig(function(config) {
     embedder.setUp_(config);
     chrome.test.sendMessage("Launched");
   });
 };