Dispatch IndexedDB IPC messages to worker threads

content/renderer/render_thread_impl.cc

Index: content/renderer/render_thread_impl.cc
diff --git a/content/renderer/render_thread_impl.cc b/content/renderer/render_thread_impl.cc
index ad67e74324aacc0a413f03054e8277295a168933..9f455bd9f678159c6df2a9e04d3224ed4717ff79 100644
--- a/content/renderer/render_thread_impl.cc
+++ b/content/renderer/render_thread_impl.cc
@@ -43,6 +43,7 @@
 #include "content/renderer/gpu/compositor_thread.h"
 #include "content/renderer/gpu/gpu_channel_host.h"
 #include "content/renderer/indexed_db_dispatcher.h"
+#include "content/renderer/indexed_db_message_filter.h"
 #include "content/renderer/media/audio_input_message_filter.h"
 #include "content/renderer/media/audio_message_filter.h"
 #include "content/renderer/media/video_capture_impl_manager.h"
@@ -198,7 +199,8 @@ void RenderThreadImpl::Init() {
   task_factory_.reset(new ScopedRunnableMethodFactory<RenderThreadImpl>(this));
 
   appcache_dispatcher_.reset(new AppCacheDispatcher(Get()));
-  indexed_db_dispatcher_.reset(new IndexedDBDispatcher());
+  main_thread_indexed_db_dispatcher_.reset(
+      IndexedDBDispatcher::ThreadSpecificInstance());
 
   db_message_filter_ = new DBMessageFilter();
   AddFilter(db_message_filter_.get());
@@ -215,6 +217,8 @@ void RenderThreadImpl::Init() {
   devtools_agent_message_filter_ = new DevToolsAgentFilter();
   AddFilter(devtools_agent_message_filter_.get());
 
+  AddFilter(new IndexedDBMessageFilter);
+
   content::GetContentClient()->renderer()->RenderThreadStarted();
 
   TRACE_EVENT_END_ETW("RenderThreadImpl::Init", 0, "");
@@ -708,8 +712,6 @@ bool RenderThreadImpl::OnControlMessageReceived(const IPC::Message& msg) {
   // Some messages are handled by delegates.
   if (appcache_dispatcher_->OnMessageReceived(msg))
     return true;
-  if (indexed_db_dispatcher_->OnMessageReceived(msg))
-    return true;
 
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(RenderThreadImpl, msg)