Grant file access permissions for cached file paths to file browsers/handlers.

chrome/test/data/extensions/api_test/filebrowser_component/remote.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.
 
 // This test file checks if we can read the expected contents
 // (kExpectedContents) from the target file (kFileName). What's
 // interesting is that we'll read the file via a remote mount point.
 // See extension_local_filesystem_apitest.cc for how this is set up.
 
 // These should match the counterparts in
@@ skipping 56 matching lines @@
         msg = 'INVALID_STATE_ERR';
         break;
       default:
         msg = 'Unknown Error';
         break;
     };
   }
   chrome.test.fail(msg);
 };
 
+function getDirFromLocationHref() {
+  var loc = window.location.href;
+  console.log("Opening tab " + loc);
+  if (loc.indexOf("#") == -1 ) {
+    console.log("No params in url, faling back to default.");
+    return "tmp";
+  }
+
+  loc = unescape(loc.substr(loc.indexOf("#") + 1));
+  return (loc[0] == '/') ? loc.substring(1) : loc;
+}
+
 function TestRunner() {
-  this.fileCreator_ = new TestFileCreator('tmp',
+  this.fileCreator_ = new TestFileCreator(getDirFromLocationHref(),
                                           false /* shouldRandomize */);
 }
 
 chrome.test.runTests([function tab() {
   var testRunner = new TestRunner();
   testRunner.runTest();
 }]);