Run all LayerTreeHost tests with a delegating renderer.

cc/resources/resource_provider.cc

Index: cc/resources/resource_provider.cc
diff --git a/cc/resources/resource_provider.cc b/cc/resources/resource_provider.cc
index 6d31210c5158ab39bacc1f14d01656f2b11a7104..d1d87ce65ff2d4c4d6f14583eab7d697c7838c23 100644
--- a/cc/resources/resource_provider.cc
+++ b/cc/resources/resource_provider.cc
@@ -304,7 +304,7 @@ void ResourceProvider::DeleteResourceInternal(ResourceMap::iterator it,
   bool lost_resource = lost_output_surface_;
 
   DCHECK(!resource->exported || style != Normal);
-  if (style == ForShutdown && resource->exported)
+  if (style == ForShutdown)

[danakj, 2013/05/09 02:42:50]

When the RP shuts down, it calls mailbox callbacks. The callback in
VideoResourceUpdater wants to delete the resource, which DCHECKs in here that
the resource exists still.

By not deleting lost resources, we can avoid this cycle and know that the RP is
gone.

I wasn't sure how else to deal with this, any better idea?

[danakj, 2013/05/09 02:43:11]

Oh, this we talked about and I reverted/fixed.

     lost_resource = true;
 
   if (resource->gl_id && !resource->external) {