Componentization: make core classes visible for blink_tests and blink_web.

Source/core/events/EventPath.h

Index: Source/core/events/EventPath.h
diff --git a/Source/core/events/EventPath.h b/Source/core/events/EventPath.h
index dbe2db45eaba79e096294b37cbd49fab5c5a163a..cd9608de597d9aed2b018ce33f900f260acc7562 100644
--- a/Source/core/events/EventPath.h
+++ b/Source/core/events/EventPath.h
@@ -27,6 +27,7 @@
 #ifndef EventPath_h
 #define EventPath_h
 
+#include "core/CoreExport.h"
 #include "core/events/NodeEventContext.h"
 #include "core/events/TreeScopeEventContext.h"
 #include "core/events/WindowEventContext.h"
@@ -43,7 +44,7 @@ class TouchEvent;
 class TouchList;
 class TreeScope;
 
-class EventPath final : public NoBaseWillBeGarbageCollectedFinalized<EventPath> {
+class CORE_EXPORT EventPath final : public NoBaseWillBeGarbageCollectedFinalized<EventPath> {
 public:
     explicit EventPath(Node&, Event* = nullptr);