Enable FilePathWatcher base unittests on Android.
It's used on Android so it should be tested on Android.
Some pieces of tests are disabled until crbug.com/475568 is fixed.
BUG=475570
R=mnissler@chromium.org
TEST=base_unittests
Review URL: https://codereview.chromium.org/1087503003
Cr-Commit-Position: refs/heads/master@{#324915}
CrOS-Libchrome-Original-Commit: 7a4e7804b6761017e6e2f944401ea273bac5887b
diff --git a/base/files/file_path_watcher.cc b/base/files/file_path_watcher.cc
index b173541..59ae705 100644
--- a/base/files/file_path_watcher.cc
+++ b/base/files/file_path_watcher.cc
@@ -32,7 +32,7 @@
// FSEvents isn't available on iOS and is broken on OSX 10.6 and earlier.
// See http://crbug.com/54822#c31
return mac::IsOSLionOrLater();
-#elif defined(OS_WIN) || defined(OS_LINUX)
+#elif defined(OS_WIN) || defined(OS_LINUX) || defined(OS_ANDROID)
return true;
#else
return false;