More work to make ash_unittests pass when we require context.

ui/views/test/views_test_base.h

Index: ui/views/test/views_test_base.h
diff --git a/ui/views/test/views_test_base.h b/ui/views/test/views_test_base.h
index f348a62abcccd39396e1b67f5b5aac705ae13fd9..b59ffef18ab4dba983fa032fd2a6d79fba8f3988 100644
--- a/ui/views/test/views_test_base.h
+++ b/ui/views/test/views_test_base.h
@@ -48,6 +48,10 @@ class ViewsTestBase : public testing::Test {
   // cross-platform tests.
   Widget::InitParams CreateParams(Widget::InitParams::Type type);
 
+  // Returns a context view. In aura builds, this will be the
+  // RootWindow. Everywhere else, NULL.
+  gfx::NativeView GetContext();
+
  private:
   MessageLoopForUI message_loop_;
   scoped_ptr<TestViewsDelegate> views_delegate_;