Cleanup WebDatabaseMigrationTest schemas after protector service removal.

chrome/test/data/web_database/version_44.sql

Index: chrome/test/data/web_database/version_44.sql
diff --git a/chrome/test/data/web_database/version_44.sql b/chrome/test/data/web_database/version_44.sql
index 25ba282d433d98ae82b2429f70b8bbba9862bdb6..e36ffea82915977f1c52729ea2996236902bd774 100644
--- a/chrome/test/data/web_database/version_44.sql
+++ b/chrome/test/data/web_database/version_44.sql
@@ -4,7 +4,7 @@ CREATE TABLE meta(key LONGVARCHAR NOT NULL UNIQUE PRIMARY KEY,value LONGVARCHAR)
 INSERT INTO "meta" VALUES('version','44');
 INSERT INTO "meta" VALUES('last_compatible_version','44');
 INSERT INTO "meta" VALUES('Default Search Provider ID Backup','0');
-INSERT INTO "meta" VALUES('Default Search Provider ID Backup Signature','ÚG"2qÐÀgõðß!ƒë¸×Ÿ‹gXÑiõg¢ÑsJw');
+INSERT INTO "meta" VALUES('Default Search Provider ID Backup Signature','');
 CREATE TABLE keywords (id INTEGER PRIMARY KEY,short_name VARCHAR NOT NULL,keyword VARCHAR NOT NULL,favicon_url VARCHAR NOT NULL,url VARCHAR NOT NULL,show_in_default_list INTEGER,safe_for_autoreplace INTEGER,originating_url VARCHAR,date_created INTEGER DEFAULT 0,usage_count INTEGER DEFAULT 0,input_encodings VARCHAR,suggest_url VARCHAR,prepopulate_id INTEGER DEFAULT 0,autogenerate_keyword INTEGER DEFAULT 0,logo_id INTEGER DEFAULT 0,created_by_policy INTEGER DEFAULT 0,instant_url VARCHAR,last_modified INTEGER DEFAULT 0,sync_guid VARCHAR);
 CREATE TABLE keywords_backup(
   id INT,