Extract webkit_unit_tests from blink_web component.

third_party/WebKit/Source/web/ExternalPopupMenu.h

Index: third_party/WebKit/Source/web/ExternalPopupMenu.h
diff --git a/third_party/WebKit/Source/web/ExternalPopupMenu.h b/third_party/WebKit/Source/web/ExternalPopupMenu.h
index e0d02c42d0e7c6fa2b9b17deff578263d7ef89a7..790f9b30aad2f79420f082a29413dc061c0442de 100644
--- a/third_party/WebKit/Source/web/ExternalPopupMenu.h
+++ b/third_party/WebKit/Source/web/ExternalPopupMenu.h
@@ -36,6 +36,8 @@
 #include "public/platform/WebCanvas.h"
 #include "public/platform/WebScrollbar.h"
 #include "public/web/WebExternalPopupMenuClient.h"
+#include "web/WebExport.h"
+#include "wtf/Compiler.h"
 
 namespace blink {
 
@@ -48,7 +50,7 @@ struct WebPopupMenuInfo;
 
 // The ExternalPopupMenu connects the actual implementation of the popup menu
 // to the WebCore popup menu.
-class ExternalPopupMenu final : public PopupMenu, public WebExternalPopupMenuClient {
+class WEB_EXPORT ExternalPopupMenu final : WTF_NON_EXPORTED_BASE(public PopupMenu), public WebExternalPopupMenuClient {

[haraken, 2016/03/01 02:41:06]

What is WTF_NON_EXPORTED_BASE for? In other words, when do we need to use it?

 public:
     ExternalPopupMenu(LocalFrame&, HTMLSelectElement&, WebViewImpl&);
     ~ExternalPopupMenu() override;