Move migration code out of WebDatabase and into table-specific classes.

chrome/browser/webdata/autofill_table.h

Index: chrome/browser/webdata/autofill_table.h
diff --git a/chrome/browser/webdata/autofill_table.h b/chrome/browser/webdata/autofill_table.h
index af7648fd22b89d1c974e570060430b56e8b597eb..d86eb1cdec7922d1d1d56edeb4f5c5fda0ee357d 100644
--- a/chrome/browser/webdata/autofill_table.h
+++ b/chrome/browser/webdata/autofill_table.h
@@ -259,6 +259,18 @@ class AutofillTable : public WebDatabaseTable {
   // Clear all profiles.
   bool ClearAutofillProfiles();
 
+  // Table migration functions.
+  bool MigrateToVersion23AddCardNumberEncryptedColumn();
+  bool MigrateToVersion24CleanupOversizedStringFields();
+  bool MigrateToVersion27UpdateLegacyCreditCards();
+  bool MigrateToVersion30AddDateModifed();
+  bool MigrateToVersion31AddGUIDToCreditCardsAndProfiles();
+  bool MigrateToVersion32UpdateProfilesAndCreditCards();
+  bool MigrateToVersion33ProfilesBasedOnFirstName();
+  bool MigrateToVersion34ProfilesBasedOnCountryCode();
+  bool MigrateToVersion35GreatBritainCountryCodes();
+  bool MigrateToVersion36MergeAndCullOlderProfiles();
+
  private:
   FRIEND_TEST_ALL_PREFIXES(AutofillTableTest, Autofill);
   FRIEND_TEST_ALL_PREFIXES(AutofillTableTest, Autofill_AddChanges);