Migrated sync_file_type and file_change from namespace fileapi to sync_file_system.

webkit/fileapi/syncable/file_change.cc

Index: webkit/fileapi/syncable/file_change.cc
diff --git a/webkit/fileapi/syncable/file_change.cc b/webkit/fileapi/syncable/file_change.cc
index 53e65707975cd67900d58c0fef3359ef9bac73cb..df1bf4de6ae7b566a8e72117b0394f391a53da9f 100644
--- a/webkit/fileapi/syncable/file_change.cc
+++ b/webkit/fileapi/syncable/file_change.cc
@@ -9,7 +9,7 @@
 
 #include "base/logging.h"
 
-namespace fileapi {
+namespace sync_file_system {
 
 FileChange::FileChange(
     ChangeType change,
@@ -87,4 +87,4 @@ std::string FileChangeList::DebugString() const {
   return ss.str();
 }
 
-}  // namespace fileapi
+}  // namespace sync_file_system