AppCache: Run a quick integrity check on the sqlite database when opening.

sql/connection.cc

Index: sql/connection.cc
diff --git a/sql/connection.cc b/sql/connection.cc
index 6e02cd755f56a31342f6291b4ae418303d5781c9..cb3a06a917ad4f93574083dea151310032a83a59 100644
--- a/sql/connection.cc
+++ b/sql/connection.cc
@@ -1050,9 +1050,10 @@ int Connection::OnSqliteError(int err, sql::Statement *stmt, const char* sql) {
   return err;
 }
 
-// TODO(shess): Allow specifying integrity_check versus quick_check.
 // TODO(shess): Allow specifying maximum results (default 100 lines).
-bool Connection::IntegrityCheck(std::vector<std::string>* messages) {
+bool Connection::IntegrityCheck(
+    std::vector<std::string>* messages,
+    bool quick) {
   messages->clear();
 
   // This has the side effect of setting SQLITE_RecoveryMode, which
@@ -1065,7 +1066,8 @@ bool Connection::IntegrityCheck(std::vector<std::string>* messages) {
 
   bool ret = false;
   {
-    const char kSql[] = "PRAGMA integrity_check";
+    const char* kSql = quick ?
+        "PRAGMA quick_check" : "PRAGMA integrity_check";
     sql::Statement stmt(GetUniqueStatement(kSql));
 
     // The pragma appears to return all results (up to 100 by default)