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

webkit/browser/appcache/appcache_database.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "webkit/browser/appcache/appcache_database.h"
 
 #include "base/auto_reset.h"
 #include "base/command_line.h"
 #include "base/file_util.h"
 #include "base/logging.h"
@@ skipping 1001 matching lines @@
   if (use_in_memory_db) {
     opened = db_->OpenInMemory();
   } else if (!base::CreateDirectory(db_file_path_.DirName())) {
     LOG(ERROR) << "Failed to create appcache directory.";
   } else {
     opened = db_->Open(db_file_path_);
     if (opened)
       db_->Preload();
   }
 
-  if (!opened || !EnsureDatabaseVersion()) {
+  if (!opened || !db_->QuickIntegrityCheck() || !EnsureDatabaseVersion()) {
     LOG(ERROR) << "Failed to open the appcache database.";
     AppCacheHistograms::CountInitResult(
         AppCacheHistograms::SQL_DATABASE_ERROR);
 
     // We're unable to open the database. This is a fatal error
     // which we can't recover from. We try to handle it by deleting
     // the existing appcache data and starting with a clean slate in
     // this browser session.
     if (!use_in_memory_db && DeleteExistingAndCreateNewDatabase())
       return true;
@@ skipping 173 matching lines @@
 
   // So we can't go recursive.
   if (is_recreating_)
     return false;
 
   base::AutoReset<bool> auto_reset(&is_recreating_, true);
   return LazyOpen(true);
 }
 
 }  // namespace appcache