NOT FOR REVIEW: Aura on Android - content shell compiles

ui/platform_window/android/platform_window_android.h

Index: ui/platform_window/android/platform_window_android.h
diff --git a/ui/platform_window/android/platform_window_android.h b/ui/platform_window/android/platform_window_android.h
index 273112621189cfddfb1addb6accb6a0924ceaf0f..74ebe686c39571307da746d46b404ac928f70c43 100644
--- a/ui/platform_window/android/platform_window_android.h
+++ b/ui/platform_window/android/platform_window_android.h
@@ -12,6 +12,7 @@
 #include "ui/gfx/geometry/rect.h"
 #include "ui/gfx/geometry/size.h"
 #include "ui/gfx/sequential_id_generator.h"
+#include "ui/platform_window/android/android_window_export.h"
 #include "ui/platform_window/android/platform_ime_controller_android.h"
 #include "ui/platform_window/platform_window.h"
 
@@ -19,7 +20,7 @@ struct ANativeWindow;
 
 namespace ui {
 
-class PlatformWindowAndroid : public PlatformWindow {
+class ANDROID_WINDOW_EXPORT PlatformWindowAndroid : public PlatformWindow {
  public:
   static bool Register(JNIEnv* env);