Media Galleries API Picasa: Add file watch to invalidate database data on disk write.

chrome/common/media_galleries/picasa_types.cc

Index: chrome/common/media_galleries/picasa_types.cc
diff --git a/chrome/common/media_galleries/picasa_types.cc b/chrome/common/media_galleries/picasa_types.cc
index 7a3b3088fb199e4ec76a83f14462c32816f22925..534dc18331850e49b6fefda459f2d1d4ecc7e705 100644
--- a/chrome/common/media_galleries/picasa_types.cc
+++ b/chrome/common/media_galleries/picasa_types.cc
@@ -32,6 +32,9 @@ void ClosePlatformFile(base::PlatformFile* platform_file) {
 
 }  // namespace
 
+const char kPicasaDatabaseDirName[] = "db3";
+const char kPicasaTempDirName[] = "tmp";
+
 const char kPicasaAlbumTableName[] = "albumdata";
 const char kAlbumTokenPrefix[] = "]album:";