Make DatabaseDispatcherHost be a message filter so that ResourceMessageFilter...

chrome/browser/worker_host/worker_process_host.h

Index: chrome/browser/worker_host/worker_process_host.h
===================================================================
--- chrome/browser/worker_host/worker_process_host.h	(revision 68877)
+++ chrome/browser/worker_host/worker_process_host.h	(working copy)
@@ -12,18 +12,15 @@
 #include "base/basictypes.h"
 #include "base/callback.h"
 #include "base/file_path.h"
-#include "base/ref_counted.h"
 #include "chrome/browser/browser_child_process_host.h"
 #include "chrome/browser/browser_message_filter.h"
 #include "chrome/browser/net/chrome_url_request_context.h"
 #include "chrome/browser/worker_host/worker_document_set.h"
 #include "googleurl/src/gurl.h"
-#include "ipc/ipc_channel.h"
 
 class BlobDispatcherHost;
 class ChromeURLRequestContext;
 class ChromeURLRequestContextGetter;
-class DatabaseDispatcherHost;
 class FileSystemDispatcherHost;
 class FileUtilitiesDispatcherHost;
 class MimeRegistryDispatcher;
@@ -214,7 +211,6 @@
   Instances instances_;
 
   scoped_refptr<ChromeURLRequestContext> request_context_;
-  scoped_refptr<DatabaseDispatcherHost> db_dispatcher_host_;
   scoped_ptr<BlobDispatcherHost> blob_dispatcher_host_;
   scoped_refptr<FileSystemDispatcherHost> file_system_dispatcher_host_;
   scoped_refptr<FileUtilitiesDispatcherHost> file_utilities_dispatcher_host_;