Register surface namespace in BlimpUiContextFactory

ui/compositor/compositor.h

Index: ui/compositor/compositor.h
diff --git a/ui/compositor/compositor.h b/ui/compositor/compositor.h
index 5222b41d956139a64fb231d456bc22ff0d261f54..98f03a941035f2f31275ac693734df431680406f 100644
--- a/ui/compositor/compositor.h
+++ b/ui/compositor/compositor.h
@@ -44,6 +44,7 @@ class LayerTreeHost;
 class RendererSettings;
 class SharedBitmapManager;
 class SurfaceIdAllocator;
+class SurfaceManager;
 class TaskGraphRunner;
 }
 
@@ -111,9 +112,12 @@ class COMPOSITOR_EXPORT ContextFactory {
   // Gets the task graph runner.
   virtual cc::TaskGraphRunner* GetTaskGraphRunner() = 0;
 
-  // Creates a Surface ID allocator with a new namespace.
+  // Creates a Surface ID allocator with a new namespace, registered with
+  // this context factory's surface manager.
   virtual scoped_ptr<cc::SurfaceIdAllocator> CreateSurfaceIdAllocator() = 0;
 
+  virtual cc::SurfaceManager* GetSurfaceManager() = 0;
+
   // Resize the display corresponding to this compositor to a particular size.
   virtual void ResizeDisplay(ui::Compositor* compositor,
                              const gfx::Size& size) = 0;