Componentization: make core/dom visible for blink_web and blink_tests.

Source/core/dom/RemoteSecurityContext.h

Index: Source/core/dom/RemoteSecurityContext.h
diff --git a/Source/core/dom/RemoteSecurityContext.h b/Source/core/dom/RemoteSecurityContext.h
index 9f5723426e64bf4a14ea029e9fe857d5392bdfc3..a6489ef4734e6a40043b6cd3aa9be0a6fe4c365d 100644
--- a/Source/core/dom/RemoteSecurityContext.h
+++ b/Source/core/dom/RemoteSecurityContext.h
@@ -5,11 +5,12 @@
 #ifndef RemoteSecurityContext_h
 #define RemoteSecurityContext_h
 
+#include "core/CoreExport.h"
 #include "core/dom/SecurityContext.h"
 
 namespace blink {
 
-class RemoteSecurityContext : public SecurityContext, public RefCounted<RemoteSecurityContext> {
+class CORE_EXPORT RemoteSecurityContext : public SecurityContext, public RefCounted<RemoteSecurityContext> {
 public:
     static PassRefPtr<RemoteSecurityContext> create();
     void setReplicatedOrigin(PassRefPtr<SecurityOrigin>);