Add DCHECK to ensure IndexedDBDispatcher doesn't get re-created.

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 320c8201a5a520b8d426f0795c7657a559188f0e..85b9c3cb993a2a30994a0b5f9462c18edbec482c 100644
--- a/content/renderer/render_thread_impl.cc
+++ b/content/renderer/render_thread_impl.cc
@@ -30,9 +30,7 @@
 #include "content/common/dom_storage_messages.h"
 #include "content/common/gpu/client/gpu_channel_host.h"
 #include "content/common/gpu/gpu_messages.h"
-#include "content/common/indexed_db/indexed_db_dispatcher.h"
 #include "content/common/indexed_db/indexed_db_message_filter.h"
-#include "content/common/indexed_db/proxy_webidbfactory_impl.h"
 #include "content/common/npobject_util.h"
 #include "content/common/plugin_messages.h"
 #include "content/common/resource_dispatcher.h"
@@ -210,8 +208,6 @@ void RenderThreadImpl::Init() {
   compositor_initialized_ = false;
 
   appcache_dispatcher_.reset(new AppCacheDispatcher(Get()));
-  main_thread_indexed_db_dispatcher_.reset(
-      IndexedDBDispatcher::ThreadSpecificInstance());

[michaeln, 2012/04/11 21:20:13]

This change looks ok but it looks like we'll end up leaking the main thread
dispatcher now (which isn't really a problem, but we'll probably need some
membot suppressions as a result).

Another way to deal with the test failure could be to make the ctor public and
call new directly at this callsite. I think there'd be no leak and no tripping
on the DCHECK that way. wdyt?

 
   media_stream_center_ = NULL;