[fsp] Rename ObserveEntry with AddWatcher.

chrome/chrome_browser_chromeos.gypi

Index: chrome/chrome_browser_chromeos.gypi
diff --git a/chrome/chrome_browser_chromeos.gypi b/chrome/chrome_browser_chromeos.gypi
index 551ef6819edee3e572adc9f037d1a6dd27aa400e..5ea26ad96477a9d211655d1cc33a0e064082e1b2 100644
--- a/chrome/chrome_browser_chromeos.gypi
+++ b/chrome/chrome_browser_chromeos.gypi
@@ -280,11 +280,11 @@
         'browser/chromeos/file_system_provider/notification_manager.cc',
         'browser/chromeos/file_system_provider/notification_manager.h',
         'browser/chromeos/file_system_provider/notification_manager_interface.h',
-        'browser/chromeos/file_system_provider/observed_entry.cc',
-        'browser/chromeos/file_system_provider/observed_entry.h',
         'browser/chromeos/file_system_provider/observer.h',
         'browser/chromeos/file_system_provider/operations/abort.cc',
         'browser/chromeos/file_system_provider/operations/abort.h',
+        'browser/chromeos/file_system_provider/operations/add_watcher.cc',
+        'browser/chromeos/file_system_provider/operations/add_watcher.h',
         'browser/chromeos/file_system_provider/operations/close_file.cc',
         'browser/chromeos/file_system_provider/operations/close_file.h',
         'browser/chromeos/file_system_provider/operations/copy_entry.cc',
@@ -299,8 +299,6 @@
         'browser/chromeos/file_system_provider/operations/get_metadata.h',
         'browser/chromeos/file_system_provider/operations/move_entry.cc',
         'browser/chromeos/file_system_provider/operations/move_entry.h',
-        'browser/chromeos/file_system_provider/operations/observe_directory.cc',
-        'browser/chromeos/file_system_provider/operations/observe_directory.h',
         'browser/chromeos/file_system_provider/operations/open_file.cc',
         'browser/chromeos/file_system_provider/operations/open_file.h',
         'browser/chromeos/file_system_provider/operations/operation.cc',
@@ -309,12 +307,12 @@
         'browser/chromeos/file_system_provider/operations/read_directory.h',
         'browser/chromeos/file_system_provider/operations/read_file.cc',
         'browser/chromeos/file_system_provider/operations/read_file.h',
+        'browser/chromeos/file_system_provider/operations/remove_watcher.cc',
+        'browser/chromeos/file_system_provider/operations/remove_watcher.h',
         'browser/chromeos/file_system_provider/operations/truncate.cc',
         'browser/chromeos/file_system_provider/operations/truncate.h',
         'browser/chromeos/file_system_provider/operations/unmount.cc',
         'browser/chromeos/file_system_provider/operations/unmount.h',
-        'browser/chromeos/file_system_provider/operations/unobserve_entry.cc',
-        'browser/chromeos/file_system_provider/operations/unobserve_entry.h',
         'browser/chromeos/file_system_provider/operations/write_file.cc',
         'browser/chromeos/file_system_provider/operations/write_file.h',
         'browser/chromeos/file_system_provider/provided_file_system.cc',
@@ -337,6 +335,8 @@
         'browser/chromeos/file_system_provider/service.h',
         'browser/chromeos/file_system_provider/service_factory.cc',
         'browser/chromeos/file_system_provider/service_factory.h',
+        'browser/chromeos/file_system_provider/watcher.cc',
+        'browser/chromeos/file_system_provider/watcher.h',
         'browser/chromeos/fileapi/external_file_protocol_handler.cc',
         'browser/chromeos/fileapi/external_file_protocol_handler.h',
         'browser/chromeos/fileapi/external_file_url_request_job.cc',