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

webkit/database/database_util.cc

 // Copyright (c) 2010 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/database/database_util.h"
 
 #include "base/utf_string_conversions.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebSecurityOrigin.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebString.h"
 #include "webkit/database/database_tracker.h"
@@ skipping 59 matching lines @@
 }
 
 string16 DatabaseUtil::GetOriginIdentifier(const GURL& url) {
   string16 spec = UTF8ToUTF16(url.spec());
   return WebKit::WebSecurityOrigin::createFromString(spec).databaseIdentifier();
 }
 
 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;
 }
 
 }  // namespace webkit_database