Fix display:none issue for <webview>.

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

Index: chrome/test/data/extensions/platform_apps/web_view/display_none_and_back/main.js
diff --git a/chrome/test/data/extensions/platform_apps/web_view/visibility_changed/main.js b/chrome/test/data/extensions/platform_apps/web_view/display_none_and_back/main.js
similarity index 77%
copy from chrome/test/data/extensions/platform_apps/web_view/visibility_changed/main.js
copy to chrome/test/data/extensions/platform_apps/web_view/display_none_and_back/main.js
index 29591a383de13f22a920b3015e4ce1b605af7505..6a54e0ff509a23fa0d6f369b3fe0ba76c426552d 100644
--- a/chrome/test/data/extensions/platform_apps/web_view/visibility_changed/main.js
+++ b/chrome/test/data/extensions/platform_apps/web_view/display_none_and_back/main.js
@@ -10,6 +10,8 @@ var failTest = function() {
   chrome.test.sendMessage('WebViewTest.FAILURE');
 };
 
+var firstTime = true;
+
 var startTest = function() {
   document.querySelector('#webview-tag-container').innerHTML =
       '<webview style="width: 10px; height: 10px; margin: 0; padding: 0;"' +
@@ -17,7 +19,12 @@ var startTest = function() {
 
   var webview = document.querySelector('webview');
   var onLoadStop = function(e) {
-    chrome.test.sendMessage('WebViewTest.LAUNCHED');
+    if (firstTime) {
+      firstTime = false;
+      chrome.test.sendMessage('WebViewTest.LAUNCHED');
+    } else {
+      chrome.test.sendMessage('WebViewTest.PASSED');
+    }
   };
 
   webview.addEventListener('loadstop', onLoadStop);
@@ -30,8 +37,8 @@ window.onAppCommand = function(command) {
     case 'hide-guest':
       document.querySelector('webview').style.display = 'none';
       break;
-    case 'hide-embedder':
-      document.body.style.display = 'none';
+    case 'show-guest':
+      document.querySelector('webview').style.display = '';
       break;
     default:
       failTest();