Delete and recreate the sync database if it is corrupt.

chrome/browser/sync/syncable/directory_backing_store.h

Index: chrome/browser/sync/syncable/directory_backing_store.h
diff --git a/chrome/browser/sync/syncable/directory_backing_store.h b/chrome/browser/sync/syncable/directory_backing_store.h
index 34cb3acdc7bdfe16946b51e938b62ffa9f4c32c9..d1e7d7deba955a0b76129ef91aa289b29724cc2c 100644
--- a/chrome/browser/sync/syncable/directory_backing_store.h
+++ b/chrome/browser/sync/syncable/directory_backing_store.h
@@ -81,6 +81,7 @@ class DirectoryBackingStore {
   FRIEND_TEST(DirectoryBackingStoreTest, MigrateVersion69To70);
   FRIEND_TEST(DirectoryBackingStoreTest, MigrateVersion70To71);
   FRIEND_TEST(DirectoryBackingStoreTest, ModelTypeIds);
+  FRIEND_TEST(DirectoryBackingStoreTest, Corruption);
   FRIEND_TEST(MigrationTest, ToCurrentVersion);
 
   // General Directory initialization and load helpers.
@@ -148,7 +149,7 @@ class DirectoryBackingStore {
   int GetVersion();
   bool MigrateToSpecifics(const char* old_columns,
                           const char* specifics_column,
-                          void (*handler_function)(
+                          void (*handler_function) (
                               SQLStatement* old_value_query,
                               int old_value_column,
                               sync_pb::EntitySpecifics* mutable_new_value));