Move test-only ContextFactory implementations out of production targets

ui/compositor/reflector.h

Index: ui/compositor/reflector.h
diff --git a/ui/compositor/reflector.h b/ui/compositor/reflector.h
index e6fb94c8482f765f67cbc060bf5ee61cfad9502b..41456957ffbf11989ad48229abca8e1a76419b17 100644
--- a/ui/compositor/reflector.h
+++ b/ui/compositor/reflector.h
@@ -5,12 +5,11 @@
 #ifndef UI_COMPOSITOR_REFLECTOR_H_
 #define UI_COMPOSITOR_REFLECTOR_H_
 
-#include "ui/compositor/compositor_export.h"
+#include "base/memory/ref_counted.h"
 
 namespace ui {
 
-class COMPOSITOR_EXPORT Reflector
-    : public base::RefCountedThreadSafe<Reflector> {
+class Reflector : public base::RefCountedThreadSafe<Reflector> {
  public:
   Reflector() {}