Send size to NativeViewportClient::OnCreated instead of GLES2Client::DidCreateContext

mojo/examples/compositor_app/compositor_host.cc

Index: mojo/examples/compositor_app/compositor_host.cc
diff --git a/mojo/examples/compositor_app/compositor_host.cc b/mojo/examples/compositor_app/compositor_host.cc
index d78b994529a1eb68eba4d505bc6eba357fe005e3..cc45c19627b2f316d77351bdce0ede7150c48490 100644
--- a/mojo/examples/compositor_app/compositor_host.cc
+++ b/mojo/examples/compositor_app/compositor_host.cc
@@ -67,8 +67,11 @@ CompositorHost::CompositorHost(GLES2ClientImpl* gles2_client_impl)
 
 CompositorHost::~CompositorHost() {}
 
-void CompositorHost::DidCreateContext(gfx::Size viewport_size) {
+void CompositorHost::SetSize(gfx::Size viewport_size) {
   tree_->SetViewportSize(viewport_size);
+}
+
+void CompositorHost::DidCreateContext() {
   tree_->SetLayerTreeHostClientReady();
   tree_->InitializeOutputSurfaceIfNeeded();
 }