Use FSEvents for recursive file watch on Mac

base/base.gypi

Index: base/base.gypi
diff --git a/base/base.gypi b/base/base.gypi
index e285bff8c0328686198687472b0638734c0fdd71..8f9f07001b879e5b4320a67602ed0b06ebb9df73 100644
--- a/base/base.gypi
+++ b/base/base.gypi
@@ -194,8 +194,12 @@
           'files/file_path_constants.cc',
           'files/file_path_watcher.cc',
           'files/file_path_watcher.h',
+          'files/file_path_watcher_fsevents.cc',
+          'files/file_path_watcher_fsevents.h',
           'files/file_path_watcher_kqueue.cc',
+          'files/file_path_watcher_kqueue.h',
           'files/file_path_watcher_linux.cc',
+          'files/file_path_watcher_mac.cc',
           'files/file_path_watcher_stub.cc',
           'files/file_path_watcher_win.cc',
           'files/file_posix.cc',
@@ -752,7 +756,10 @@
                'file_util.cc',
                'file_util_posix.cc',
                'files/file_enumerator_posix.cc',
+               'files/file_path_watcher_fsevents.cc',
+               'files/file_path_watcher_fsevents.h',
                'files/file_path_watcher_kqueue.cc',
+               'files/file_path_watcher_kqueue.h',
                'files/file_proxy.cc',
                'files/file_util_proxy.cc',
                'memory/shared_memory_posix.cc',
@@ -784,7 +791,10 @@
           ['OS == "android" and >(nacl_untrusted_build)==0', {
             'sources!': [
               'base_paths_posix.cc',
+              'files/file_path_watcher_fsevents.cc',
+              'files/file_path_watcher_fsevents.h',
               'files/file_path_watcher_kqueue.cc',
+              'files/file_path_watcher_kqueue.h',
               'files/file_path_watcher_stub.cc',
               'power_monitor/power_monitor_device_source_posix.cc',
             ],
@@ -849,6 +859,9 @@
               ['include', '^process/.*_ios\.(cc|mm)$'],
               ['include', '^process/memory_stubs\.cc$'],
               ['include', '^process/process_handle_posix\.cc$'],
+              ['exclude', 'files/file_path_watcher_fsevents.cc'],
+              ['exclude', 'files/file_path_watcher_fsevents.h'],
+              ['include', 'files/file_path_watcher_mac.cc'],
             ],
             'sources': [
               'process/memory_stubs.cc',
@@ -864,6 +877,9 @@
               ['include', '(^|/)(cocoa|mac)/'],
               ['exclude', '_ios(_unittest)?\\.(h|cc|mm?)$'],
               ['exclude', '(^|/)ios/'],
+              ['exclude', 'files/file_path_watcher_fsevents.cc'],
+              ['exclude', 'files/file_path_watcher_fsevents.h'],
+              ['include', 'files/file_path_watcher_mac.cc'],
             ]
           }],
           # For now, just test the *BSD platforms enough to exclude them.
@@ -882,7 +898,10 @@
             ],
             'sources!': [
               'event_recorder_stubs.cc',
+              'files/file_path_watcher_fsevents.cc',
+              'files/file_path_watcher_fsevents.h',
               'files/file_path_watcher_kqueue.cc',
+              'files/file_path_watcher_kqueue.h',
               'files/file_path_watcher_stub.cc',
               'message_loop/message_pump_libevent.cc',
               'posix/file_descriptor_shuffle.cc',
@@ -899,7 +918,10 @@
           }],
           ['OS == "linux" and >(nacl_untrusted_build)==0', {
             'sources!': [
+              'files/file_path_watcher_fsevents.cc',
+              'files/file_path_watcher_fsevents.h',
               'files/file_path_watcher_kqueue.cc',
+              'files/file_path_watcher_kqueue.h',
               'files/file_path_watcher_stub.cc',
             ],
           }],