Try to reset quota database which is suspected to be corrupted

storage/browser/quota/quota_database.cc

Index: storage/browser/quota/quota_database.cc
diff --git a/storage/browser/quota/quota_database.cc b/storage/browser/quota/quota_database.cc
index 85e0000645c35c8d3dac722c82d997a69ebcb6c2..f91ca23cfae24f536cf6b15d95161a73fb4f5f19 100644
--- a/storage/browser/quota/quota_database.cc
+++ b/storage/browser/quota/quota_database.cc
@@ -475,11 +475,16 @@ bool QuotaDatabase::LazyOpen(bool create_if_needed) {
 bool QuotaDatabase::EnsureDatabaseVersion() {
   static const size_t kTableCount = arraysize(kTables);
   static const size_t kIndexCount = arraysize(kIndexes);
-  if (!sql::MetaTable::DoesTableExist(db_.get()))
-    return CreateSchema(db_.get(), meta_table_.get(),
+  if (!sql::MetaTable::DoesTableExist(db_.get())) {
+    if (CreateSchema(db_.get(), meta_table_.get(),
                         kCurrentVersion, kCompatibleVersion,
                         kTables, kTableCount,
-                        kIndexes, kIndexCount);
+                        kIndexes, kIndexCount))
+      return true;
+
+    LOG(ERROR) << "Failed to create schema: probably database is currupted.";
+    return ResetSchema();

[michaeln, 2015/07/23 19:54:18]

I was wondering how this fixed a crash? Its not really a crash in release
builds. A corrupt DB runs afoul a DLOG(FATAL) statement when being opened and
crashes debug builds.

A new unittest quota_database_unittest.cc would be good. That file is in
content\browser\quota. The crashing in debug builds behavior can probably be
avoided with a ScopedErrorIgnorer. CorruptSizeInHeader() can help create corrupt
dbs.

+  }
 
   if (!meta_table_->Init(db_.get(), kCurrentVersion, kCompatibleVersion))
     return false;