Media Galleries: Add a dropPermissionForMediaFileSystem() API.

chrome/test/data/extensions/api_test/media_galleries/read_access/test.js

Index: chrome/test/data/extensions/api_test/media_galleries/read_access/test.js
===================================================================
--- chrome/test/data/extensions/api_test/media_galleries/read_access/test.js	(revision 261942)
+++ chrome/test/data/extensions/api_test/media_galleries/read_access/test.js	(working copy)
@@ -64,7 +64,7 @@
   TestFirstFilesystem(verifyFilesystem);
 }
 
-function GetMediaFileSystemMetadata() {
+function GetMediaFileSystemMetadataTest() {
   function verifyFilesystem(filesystem) {
     var metadata = mediaGalleries.getMediaFileSystemMetadata(filesystem);
     checkMetadata(metadata);
@@ -74,7 +74,7 @@
   TestFirstFilesystem(verifyFilesystem);
 }
 
-function GetAllMediaFileSystemMetadata() {
+function GetAllMediaFileSystemMetadataTest() {
   function verifyMetadataList(metadataList) {
     chrome.test.assertEq(1, metadataList.length)
     checkMetadata(metadataList[0]);
@@ -84,6 +84,32 @@
   mediaGalleries.getAllMediaFileSystemMetadata(verifyMetadataList);
 }
 
+function ForgetMediaFileSystemTest() {
+  var forgottenFS;
+
+  function callForget(filesystem) {
+    forgottenFS = filesystem;
+    mediaGalleries.forgetMediaFileSystem(filesystem, verifyForgetSucceeded);
+  }
+
+  function verifyForgetSucceeded(forgotten) {
+    chrome.test.assertTrue(forgotten);
+    mediaGalleries.getMediaFileSystems(verifyNoFileSystemAccess);
+  }
+
+  function verifyNoFileSystemAccess(results) {
+    chrome.test.assertEq(0, results.length);
+    mediaGalleries.forgetMediaFileSystem(forgottenFS, verifyForgetFailed);
+  }
+
+  function verifyForgetFailed(forgotten) {
+    chrome.test.assertFalse(forgotten);
+    chrome.test.succeed();
+  }
+
+  TestFirstFilesystem(callForget);
+}
+
 CreateDummyWindowToPreventSleep();
 
 chrome.test.getConfig(function(config) {
@@ -94,7 +120,8 @@
     ReadDirectoryTest,
     ReadFileToBytesTest,
     GetMetadataTest,
-    GetMediaFileSystemMetadata,
-    GetAllMediaFileSystemMetadata,
+    GetMediaFileSystemMetadataTest,
+    GetAllMediaFileSystemMetadataTest,
+    ForgetMediaFileSystemTest,
   ]);
 })