Send resize event when the screen info changes.

ui/aura/test/test_screen.cc

Index: ui/aura/test/test_screen.cc
diff --git a/ui/aura/test/test_screen.cc b/ui/aura/test/test_screen.cc
index 266963d9dc36b8f2b26888a3fb870d58a7ed222b..317d3a39f1dd0c7504d7ea8445764ebcec31ea7f 100644
--- a/ui/aura/test/test_screen.cc
+++ b/ui/aura/test/test_screen.cc
@@ -64,7 +64,8 @@ void TestScreen::SetDisplayRotation(gfx::Display::Rotation rotation) {
   }
   display_.set_rotation(rotation);
   display_.SetScaleAndBounds(display_.device_scale_factor(), new_bounds);
-  host_->SetRootTransform(GetRotationTransform() * GetUIScaleTransform());
+  if (host_)
+    host_->SetRootTransform(GetRotationTransform() * GetUIScaleTransform());

[sadrul, 2015/04/10 22:58:30]

We don't do null checks elsewhere in this file. Is some test missing a call to
CreateHostForPrimaryDisplay()?

 }
 
 void TestScreen::SetUIScale(float ui_scale) {