Use FSEvents for recursive file watch on Mac

base/files/file_path_watcher_browsertest.cc

Index: base/files/file_path_watcher_browsertest.cc
diff --git a/base/files/file_path_watcher_browsertest.cc b/base/files/file_path_watcher_browsertest.cc
index 2bdcf13827c88216eb1db428780d0227a61cb5a8..4ec8ababe30c3b561b0d886032a8b02e91579d06 100644
--- a/base/files/file_path_watcher_browsertest.cc
+++ b/base/files/file_path_watcher_browsertest.cc
@@ -205,9 +205,8 @@ bool FilePathWatcherTest::SetupWatch(const FilePath& target,
   bool result;
   file_thread_.message_loop_proxy()->PostTask(
       FROM_HERE,
-      base::Bind(SetupWatchCallback,
-                 target, watcher, delegate, recursive_watch, &result,
-                 &completion));
+      base::Bind(SetupWatchCallback, target, watcher, delegate, recursive_watch,
+                 &result, &completion));
   completion.Wait();
   return result;
 }
@@ -483,7 +482,7 @@ TEST_F(FilePathWatcherTest, MoveParent) {
   DeleteDelegateOnFileThread(subdir_delegate.release());
 }
 
-#if defined(OS_WIN) || defined(OS_LINUX)
+#if defined(OS_WIN) || defined(OS_LINUX) || defined(OS_MACOSX)
 TEST_F(FilePathWatcherTest, RecursiveWatch) {
   FilePathWatcher watcher;
   FilePath dir(temp_dir_.path().AppendASCII("dir"));
@@ -548,6 +547,45 @@ TEST_F(FilePathWatcherTest, RecursiveWatch) {
 }
 #endif
 
+#if defined(OS_LINUX) || defined(OS_MACOSX)
+TEST_F(FilePathWatcherTest, RecursiveWithSymLink) {
+  FilePathWatcher watcher;
+  FilePath test_dir(temp_dir_.path().AppendASCII("test_dir"));
+  ASSERT_TRUE(base::CreateDirectory(test_dir));
+  FilePath symlink(test_dir.AppendASCII("symlink"));
+  scoped_ptr<TestDelegate> delegate(new TestDelegate(collector()));
+  ASSERT_TRUE(SetupWatch(symlink, &watcher, delegate.get(), true));
+
+  // Link creation.
+  FilePath target1(temp_dir_.path().AppendASCII("target1"));
+  ASSERT_TRUE(base::CreateSymbolicLink(target1, symlink));
+  ASSERT_TRUE(WaitForEvents());
+
+  // Target1 creation.
+  ASSERT_TRUE(base::CreateDirectory(target1));
+  ASSERT_TRUE(WaitForEvents());
+
+  // Create a file in target1.
+  FilePath target1_file(target1.AppendASCII("file"));
+  ASSERT_TRUE(WriteFile(target1_file, "content"));
+  ASSERT_TRUE(WaitForEvents());
+
+  // Link change.
+  FilePath target2(temp_dir_.path().AppendASCII("target2"));
+  ASSERT_TRUE(base::CreateDirectory(target2));
+  ASSERT_TRUE(base::DeleteFile(symlink, false));
+  ASSERT_TRUE(base::CreateSymbolicLink(target2, symlink));
+  ASSERT_TRUE(WaitForEvents());
+
+  // Create a file in target2.
+  FilePath target2_file(target2.AppendASCII("file"));
+  ASSERT_TRUE(WriteFile(target2_file, "content"));
+  ASSERT_TRUE(WaitForEvents());
+
+  DeleteDelegateOnFileThread(delegate.release());
+}
+#endif
+
 TEST_F(FilePathWatcherTest, MoveChild) {
   FilePathWatcher file_watcher;
   FilePathWatcher subdir_watcher;