Move all <webview> tests to web_view directory

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 = {};
 
 // Creates a <webview> tag in document.body and returns the reference to it.
 // It also sets a dummy src. The dummy src is significant because this makes
 // sure that the <object> shim is created (asynchronously at this point) for the
 // <webview> tag. This makes the <webview> tag ready for add/removeEventListener
@@ skipping 205 matching lines @@
             chrome.test.assertEq(1, results.length);
             chrome.test.assertEq('red', results[0]);
             chrome.test.succeed();
           });
       });
       webview.setAttribute('src', 'data:text/html,trigger navigation');
       document.body.appendChild(webview);
     }
   ]);
 };