Fix remaining incompatibilities between scoped_ptr and unique_ptr.

ash/test/test_keyboard_ui.cc

Index: ash/test/test_keyboard_ui.cc
diff --git a/ash/test/test_keyboard_ui.cc b/ash/test/test_keyboard_ui.cc
index 67b6993875f39aaf81b7d4f2f7d24ef20437f58c..20f9b44ca0e75f008ce15f5570168e8b8f6f88e5 100644
--- a/ash/test/test_keyboard_ui.cc
+++ b/ash/test/test_keyboard_ui.cc
@@ -17,7 +17,7 @@ TestKeyboardUI::TestKeyboardUI() {}
 TestKeyboardUI::~TestKeyboardUI() {}
 
 bool TestKeyboardUI::HasKeyboardWindow() const {
-  return keyboard_;
+  return !!keyboard_;
 }
 
 bool TestKeyboardUI::ShouldWindowOverscroll(aura::Window* window) const {