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

webkit/browser/appcache/appcache_storage_impl.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_storage_impl.h"
 
 #include <algorithm>
 #include <functional>
 #include <set>
 #include <vector>
@@ skipping 1785 matching lines @@
     cache_thread_ = NULL;
 
     if (rv != net::ERR_IO_PENDING)
       OnDiskCacheInitialized(rv);
   }
   return disk_cache_.get();
 }
 
 void AppCacheStorageImpl::OnDiskCacheInitialized(int rv) {
   if (rv != net::OK) {
-    LOG(ERROR) << "Failed to open the appcache diskcache.";
+    VLOG(1) << "Failed to open the appcache diskcache.";
     AppCacheHistograms::CountInitResult(AppCacheHistograms::DISK_CACHE_ERROR);
 
     // We're unable to open the disk cache, this is a fatal error that we can't
     // really recover from. We handle it by temporarily disabling the appcache
     // deleting the directory on disk and reinitializing the appcache system.
     Disable();
     if (!is_incognito_ && rv != net::ERR_ABORTED) {
       VLOG(1) << "Deleting existing appcache data and starting over.";
       db_thread_->PostTaskAndReply(
           FROM_HERE,
           base::Bind(base::IgnoreResult(&base::DeleteFile),
                      cache_directory_, true),
           base::Bind(&AppCacheStorageImpl::CallReinitialize,
                      weak_factory_.GetWeakPtr()));
     }
   }
 }
 
 void AppCacheStorageImpl::CallReinitialize() {
   service_->Reinitialize();
   // note: 'this' may be deleted during reinit.
 }
 
 }  // namespace appcache