Mojo multiple command buffer support and sample

mojo/services/surfaces/surfaces_impl.cc

Index: mojo/services/surfaces/surfaces_impl.cc
diff --git a/mojo/services/surfaces/surfaces_impl.cc b/mojo/services/surfaces/surfaces_impl.cc
index 5d33d49783eff73fe41d1e7bdff118819c1d9738..7f24a0fb954902b8e4af47c04aa088ce0a0ee01a 100644
--- a/mojo/services/surfaces/surfaces_impl.cc
+++ b/mojo/services/surfaces/surfaces_impl.cc
@@ -44,7 +44,9 @@ void SurfacesImpl::SubmitFrame(SurfaceIdPtr id, FramePtr frame_ptr) {
   cc::SurfaceId cc_id = id.To<cc::SurfaceId>();
   if (cc::SurfaceIdAllocator::NamespaceForId(cc_id) != id_namespace_) {
     // Bad message, do something bad to the caller?
-    NOTREACHED();
+    LOG(FATAL) << "Received frame for id " << cc_id.id << " namespace "
+               << cc::SurfaceIdAllocator::NamespaceForId(cc_id)
+               << " should be namespace " << id_namespace_;
     return;
   }
   factory_.SubmitFrame(id.To<cc::SurfaceId>(), mojo::ConvertTo(frame_ptr));
@@ -69,7 +71,9 @@ void SurfacesImpl::CreateGLES2BoundSurface(CommandBufferPtr gles2_client,
   cc::SurfaceId cc_id = id.To<cc::SurfaceId>();
   if (cc::SurfaceIdAllocator::NamespaceForId(cc_id) != id_namespace_) {
     // Bad message, do something bad to the caller?
-    NOTREACHED();
+    LOG(FATAL) << "Received request for id " << cc_id.id << " namespace "
+               << cc::SurfaceIdAllocator::NamespaceForId(cc_id)
+               << " should be namespace " << id_namespace_;
     return;
   }
   if (!display_) {