Changes code using Compositor to pass in ContextFactory

ui/aura/window_tree_host_mac.mm

Index: ui/aura/window_tree_host_mac.mm
diff --git a/ui/aura/window_tree_host_mac.mm b/ui/aura/window_tree_host_mac.mm
index 7fb3f82a2eccfaf21e25016c10aab245ff45a461..fd41bcff2cb70f881c3a41845d6f04409b85e5af 100644
--- a/ui/aura/window_tree_host_mac.mm
+++ b/ui/aura/window_tree_host_mac.mm
@@ -9,14 +9,15 @@
 
 namespace aura {
 
-WindowTreeHostMac::WindowTreeHostMac(const gfx::Rect& bounds) {
+WindowTreeHostMac::WindowTreeHostMac(const gfx::Rect& bounds,
+                                     ui::ContextFactory* context_factory) {
   window_.reset(
       [[NSWindow alloc]
           initWithContentRect:NSRectFromCGRect(bounds.ToCGRect())
                     styleMask:NSBorderlessWindowMask
                       backing:NSBackingStoreBuffered
                         defer:NO]);
-  CreateCompositor(GetAcceleratedWidget());
+  CreateCompositor(GetAcceleratedWidget(), context_factory);
 }
 
 WindowTreeHostMac::~WindowTreeHostMac() {
@@ -101,8 +102,9 @@ void WindowTreeHostMac::OnDeviceScaleFactorChanged(float device_scale_factor) {
 }
 
 // static
-WindowTreeHost* WindowTreeHost::Create(const gfx::Rect& bounds) {
-  return new WindowTreeHostMac(bounds);
+WindowTreeHost* WindowTreeHost::Create(const gfx::Rect& bounds,
+                                       ui::ContextFactory* context_factory) {
+  return new WindowTreeHostMac(bounds, context_factory);
 }
 
 // static