Fix build.

sky/tools/debugger/debugger.cc

Index: sky/tools/debugger/debugger.cc
diff --git a/sky/tools/debugger/debugger.cc b/sky/tools/debugger/debugger.cc
index e4aa111a0abea8f19f4282d6666e3f83be1c564d..29bae26af7e5def7a352bd60daf3a6ea60ce408f 100644
--- a/sky/tools/debugger/debugger.cc
+++ b/sky/tools/debugger/debugger.cc
@@ -85,8 +85,8 @@ class SkyDebugger : public mojo::ApplicationDelegate,
   }
 
   virtual void OnViewBoundsChanged(mojo::View* view,
-                                   const gfx::Rect& old_bounds,
-                                   const gfx::Rect& new_bounds) override {
+                                   const mojo::Rect& old_bounds,
+                                   const mojo::Rect& new_bounds) override {
     content_->SetBounds(new_bounds);
   }