We need this work-around for file:/// URIs as

webkit/database/database_util.cc

Index: webkit/database/database_util.cc
===================================================================
--- webkit/database/database_util.cc	(revision 86470)
+++ webkit/database/database_util.cc	(working copy)
@@ -77,7 +77,11 @@
 GURL DatabaseUtil::GetOriginFromIdentifier(const string16& origin_identifier) {
   GURL origin(WebKit::WebSecurityOrigin::createFromDatabaseIdentifier(
       origin_identifier).toString());
-  DCHECK(origin == origin.GetOrigin());
+  // We need this work-around for file:/// URIs as
+  // createFromDatabaseIdentifier returns empty origin url for them.
+  if (origin.spec().empty() &&
+      origin_identifier.find(ASCIIToUTF16("file__")) == 0)
+    return GURL("file:///");
   return origin;
 }