Move FilePathWatcher to base/files.

base/files/file_path_watcher_win.cc

Index: base/files/file_path_watcher_win.cc
diff --git a/content/common/file_path_watcher/file_path_watcher_win.cc b/base/files/file_path_watcher_win.cc
similarity index 99%
rename from content/common/file_path_watcher/file_path_watcher_win.cc
rename to base/files/file_path_watcher_win.cc
index bf24e18ce3e47d0e3c8a837142f26168295ac4e8..595ace9acb806a804da90f6a7cfd9481d2d5773b 100644
--- a/content/common/file_path_watcher/file_path_watcher_win.cc
+++ b/base/files/file_path_watcher_win.cc
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "content/common/file_path_watcher/file_path_watcher.h"
+#include "base/files/file_path_watcher.h"
 
 #include "base/file_path.h"
 #include "base/file_util.h"
@@ -12,6 +12,8 @@
 #include "base/time.h"
 #include "base/win/object_watcher.h"
 
+using ::base::files::FilePathWatcher;
+
 namespace {
 
 class FilePathWatcherImpl : public FilePathWatcher::PlatformDelegate,