[fsp] Add an option for mounting in R/W mode.

chrome/test/data/extensions/api_test/file_system_provider/mount/test.js

 // Copyright 2013 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.
 
 'use strict';
 
 /**
  * Runs all of the test cases, one by one.
  */
 chrome.test.runTests([
@@ skipping 16 matching lines @@
     chrome.fileSystemProvider.mount(
         {fileSystemId: 'file-system-id', displayName: ''},
         function() {
           chrome.test.fail();
         },
         function(error) {
           chrome.test.assertEq('SecurityError', error.name);
           onTestSuccess();
         });
   },
+
   // Verifies that mounting fails, when an empty string is provided as an Id
   function emptyFileSystemId() {
     var onTestSuccess = chrome.test.callbackPass();
     chrome.fileSystemProvider.mount(
         {fileSystemId: '', displayName: 'File System Name'},
         function() {
           chrome.test.fail();
         },
         function(error) {
           chrome.test.assertEq('SecurityError', error.name);
           onTestSuccess();
         }
       );
   },
 
   // End to end test. Mounts a volume using fileSystemProvider.mount(), then
   // checks if the mounted volume is added to VolumeManager, by querying
   // fileBrowserPrivate.getVolumeMetadataList().
   function successfulMount() {
     var onTestSuccess = chrome.test.callbackPass();
     var fileSystemId = 'caramel-candy';
     chrome.fileSystemProvider.mount(
         {fileSystemId: fileSystemId, displayName: 'caramel-candy.zip'},
         function() {
           chrome.fileBrowserPrivate.getVolumeMetadataList(function(volumeList) {
-            var found = false;
-            volumeList.forEach(function(volumeInfo) {
-              if (volumeInfo.extensionId == chrome.runtime.id &&
-                  volumeInfo.fileSystemId == fileSystemId) {
-                found = true;
+            var volumeInfo;
+            volumeList.forEach(function(inVolumeInfo) {
+              if (inVolumeInfo.extensionId == chrome.runtime.id &&
+                  inVolumeInfo.fileSystemId == fileSystemId) {
+                volumeInfo = inVolumeInfo;
               }
             });
-            chrome.test.assertTrue(found);
+            chrome.test.assertTrue(!!volumeInfo);
+            chrome.test.assertTrue(volumeInfo.isReadOnly);
             onTestSuccess();
           });
         },
+        function(error) {
+          chrome.test.fail();
+        });
+  },
+
+  // Checks whether mounting a file system in writable mode ends up on filling
+  // out the volume info properly.
+  function successfulWritableMount() {
+    var onTestSuccess = chrome.test.callbackPass();
+    var fileSystemId = 'caramel-fudges';
+    chrome.fileSystemProvider.mount(
+        {
+          fileSystemId: fileSystemId,
+          displayName: 'caramel-fudges.zip',
+          writable: true
+        },
+        function() {
+          chrome.fileBrowserPrivate.getVolumeMetadataList(function(volumeList) {
+            var volumeInfo;
+            volumeList.forEach(function(inVolumeInfo) {
+              if (inVolumeInfo.extensionId == chrome.runtime.id &&
+                  inVolumeInfo.fileSystemId == fileSystemId) {
+                volumeInfo = inVolumeInfo;
+              }
+            });
+            chrome.test.assertTrue(!!volumeInfo);
+            chrome.test.assertFalse(volumeInfo.isReadOnly);
+            onTestSuccess();
+          });
+        },
         function(error) {
           chrome.test.fail();
         });
   },
 
   // Checks is limit for mounted file systems per profile works correctly.
   // Tries to create more than allowed number of file systems. All of the mount
   // requests should succeed, except the last one which should fail with a
   // security error.
   function stressMountTest() {
     var onTestSuccess = chrome.test.callbackPass();
-    var ALREADY_MOUNTED_FILE_SYSTEMS = 2;  // By previous tests.
+    var ALREADY_MOUNTED_FILE_SYSTEMS = 3;  // By previous tests.
     var MAX_FILE_SYSTEMS = 16;
     var index = 0;
     var tryNextOne = function() {
       index++;
       if (index < MAX_FILE_SYSTEMS - ALREADY_MOUNTED_FILE_SYSTEMS + 1) {
         var fileSystemId = index + '-stress-test';
         chrome.fileSystemProvider.mount(
             {fileSystemId: fileSystemId, displayName: index + 'th File System'},
             function() {
               tryNextOne();
@@ skipping 12 matching lines @@
             },
             function(error) {
               chrome.test.assertEq('SecurityError', error.name);
               onTestSuccess();
             });
       }
     };
     tryNextOne();
   }
 ]);