For c++, Generate enum classes instead of enum from mojom.

examples/ganesh_app/texture_uploader.cc

Index: examples/ganesh_app/texture_uploader.cc
diff --git a/examples/ganesh_app/texture_uploader.cc b/examples/ganesh_app/texture_uploader.cc
index eb8db39a8d740dfbcc096cbc853faacce2cfc8fc..08d27f1633a1e5c3940cb875b30fa58394ae9845 100644
--- a/examples/ganesh_app/texture_uploader.cc
+++ b/examples/ganesh_app/texture_uploader.cc
@@ -76,7 +76,7 @@ void TextureUploader::Upload(scoped_ptr<mojo::GLTexture> texture) {
   mojo::TransferableResourcePtr resource = mojo::TransferableResource::New();
   resource->id = next_resource_id_++;
   resource_to_texture_map_[resource->id] = texture.release();
-  resource->format = mojo::RESOURCE_FORMAT_RGBA_8888;
+  resource->format = mojo::ResourceFormat::RGBA_8888;
   resource->filter = GL_LINEAR;
   resource->size = size.Clone();
   mojo::MailboxHolderPtr mailbox_holder = mojo::MailboxHolder::New();
@@ -90,7 +90,7 @@ void TextureUploader::Upload(scoped_ptr<mojo::GLTexture> texture) {
   resource->is_software = false;
 
   mojo::QuadPtr quad = mojo::Quad::New();
-  quad->material = mojo::MATERIAL_TEXTURE_CONTENT;
+  quad->material = mojo::Material::TEXTURE_CONTENT;
 
   mojo::RectPtr rect = mojo::Rect::New();
   rect->width = size.width;