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

Source/core/css/CSSFontSelectorClient.h

Index: Source/core/css/CSSFontSelectorClient.h
diff --git a/Source/core/css/CSSFontSelectorClient.h b/Source/core/css/CSSFontSelectorClient.h
index 97eb5636b7cf2403d135cd94af49bbfbb8d74f96..11abf89ff7f6445343969039acedbba68f10ba95 100644
--- a/Source/core/css/CSSFontSelectorClient.h
+++ b/Source/core/css/CSSFontSelectorClient.h
@@ -31,6 +31,7 @@
 #ifndef CSSFontSelectorClient_h
 #define CSSFontSelectorClient_h
 
+#include "core/CoreExport.h"
 #include "platform/heap/Handle.h"
 
 namespace blink {
@@ -38,7 +39,7 @@ namespace blink {
 class CSSFontSelector;
 class Visitor;
 
-class CSSFontSelectorClient : public NoBaseWillBeGarbageCollectedFinalized<CSSFontSelectorClient> {
+class CORE_EXPORT CSSFontSelectorClient : public NoBaseWillBeGarbageCollectedFinalized<CSSFontSelectorClient> {
 public:
     virtual ~CSSFontSelectorClient() { }