Implementation of shared worker code path for WebView file system permission.

chrome/test/data/extensions/platform_apps/web_view/filesystem/shared_worker/multiple/shared_worker.js

Index: chrome/test/data/extensions/platform_apps/web_view/filesystem/shared_worker/multiple/shared_worker.js
diff --git a/chrome/test/data/extensions/platform_apps/web_view/filesystem/shared_worker/multiple/shared_worker.js b/chrome/test/data/extensions/platform_apps/web_view/filesystem/shared_worker/multiple/shared_worker.js
new file mode 100644
index 0000000000000000000000000000000000000000..da2ef16ed4048bfd7f7991c3e96cb80dda3c8501
--- /dev/null
+++ b/chrome/test/data/extensions/platform_apps/web_view/filesystem/shared_worker/multiple/shared_worker.js
@@ -0,0 +1,43 @@
+// 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.
+
+self.requestFileSystemSync = self.webkitRequestFileSystemSync ||
+                             self.requestFileSystemSync;
+
+addEventListener('connect', function(e) {
+  var port = e.ports[0];
+  function onError(e) {
+    port.postMessage({ 'type': 'error', 'msg': e.toString() });
+  }
+
+  function echoMsg(msg) {
+    port.postMessage({'type': 'echo', 'msg': msg});
+  }
+
+  function requestFileSystem() {
+    try {
+      echoMsg("call requetFileSystem");
+      var filesystem = requestFileSystemSync(PERSISTENT, 1024 * 1024 /* 1MB */);
+      var result = filesystem ? 1 : 0;
+      port.postMessage({'type': 'result', 'msg': result});
+    } catch (e) {
+      onError(e);
+    }
+  }
+
+  port.addEventListener('message', function(e) {
+    var data = e.data;
+    switch(data.type) {
+      case 'echo':
+        port.postMessage({'type': 'echo', 'msg': data.msg});
+        return;
+      case 'requestFileSystem':
+        requestFileSystem();
+        return;
+      default:
+        port.postMessage({'type': 'error', 'msg': 'UNKNOWN MESSAGE TYPE'});
+    }
+  });
+  port.start();
+});