ui + mus: Split ContextFactory into ContextFactory(Client) and ContextFactoryPrivate

content/browser/renderer_host/render_widget_host_view_aura.cc

Index: content/browser/renderer_host/render_widget_host_view_aura.cc
diff --git a/content/browser/renderer_host/render_widget_host_view_aura.cc b/content/browser/renderer_host/render_widget_host_view_aura.cc
index 508ae90e472c19683073aa2263ec6d6b8b3ce764..c4610b70fda3c5f69d1d60e7c5f2d2335f3579e5 100644
--- a/content/browser/renderer_host/render_widget_host_view_aura.cc
+++ b/content/browser/renderer_host/render_widget_host_view_aura.cc
@@ -391,7 +391,7 @@ RenderWidgetHostViewAura::RenderWidgetHostViewAura(RenderWidgetHost* host,
   ImageTransportFactory* factory = ImageTransportFactory::GetInstance();
   cc::FrameSinkId frame_sink_id =
       is_guest_view_hack_
-          ? factory->GetContextFactory()->AllocateFrameSinkId()
+          ? factory->GetContextFactoryPrivate()->AllocateFrameSinkId()
           : cc::FrameSinkId(
                 base::checked_cast<uint32_t>(host_->GetProcess()->GetID()),
                 base::checked_cast<uint32_t>(host_->GetRoutingID()));