[fsp] Wire limiting number of opened files to FSP API.

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

Index: chrome/test/data/extensions/api_test/file_system_provider/mount/test.js
diff --git a/chrome/test/data/extensions/api_test/file_system_provider/mount/test.js b/chrome/test/data/extensions/api_test/file_system_provider/mount/test.js
index 81b6ae7207aa51ac2c50f01b8e62096c6b634c9b..83e2c374536d6009bde79eee3cd6757bb6b8622f 100644
--- a/chrome/test/data/extensions/api_test/file_system_provider/mount/test.js
+++ b/chrome/test/data/extensions/api_test/file_system_provider/mount/test.js
@@ -18,7 +18,7 @@ chrome.test.runTests([
   // Verifies that mounting fails, when an empty string is provided as a name.
   function emptyDisplayName() {
     chrome.fileSystemProvider.mount(
-        {fileSystemId: 'file-system-id', displayName: ''},
+        {fileSystemId: 'file-system-id-2', displayName: ''},
         chrome.test.callbackFail('INVALID_OPERATION'));
   },
 
@@ -29,6 +29,36 @@ chrome.test.runTests([
         chrome.test.callbackFail('INVALID_OPERATION'));
   },
 
+  // Verifies that mounting succeeds, when a positive limit for opened files is
+  // provided.
+  function goodOpenedFilesLimit() {
+    chrome.fileSystemProvider.mount({
+      fileSystemId: 'file-system-id-3',
+      displayName: 'File System Name',
+      openedFilesLimit: 10
+    }, chrome.test.callbackPass());
+  },
+
+  // Verifies that mounting succeeds, when limit for number of opened files is
+  // set to 0. It means no limit.
+  function goodOpenedFilesLimit() {
+    chrome.fileSystemProvider.mount({
+      fileSystemId: 'file-system-id-4',
+      displayName: 'File System Name',
+      openedFilesLimit: 0
+    }, chrome.test.callbackPass());
+  },
+
+  // Verifies that mounting fails, when a negative limit for opened files is
+  // provided.
+  function illegalOpenedFilesLimit() {
+    chrome.fileSystemProvider.mount({
+      fileSystemId: 'file-system-id-5',
+      displayName: 'File System Name',
+      openedFilesLimit: -1
+    }, chrome.test.callbackFail('INVALID_OPERATION'));
+  },
+
   // End to end test. Mounts a volume using fileSystemProvider.mount(), then
   // checks if the mounted volume is added to VolumeManager, by querying
   // fileManagerPrivate.getVolumeMetadataList().
@@ -81,7 +111,7 @@ chrome.test.runTests([
   // requests should succeed, except the last one which should fail with a
   // security error.
   function stressMountTest() {
-    var ALREADY_MOUNTED_FILE_SYSTEMS = 3;  // By previous tests.
+    var ALREADY_MOUNTED_FILE_SYSTEMS = 5;  // By previous tests.
     var MAX_FILE_SYSTEMS = 16;
     var index = 0;
     var tryNextOne = function() {