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

Source/core/dom/CharacterData.h

Index: Source/core/dom/CharacterData.h
diff --git a/Source/core/dom/CharacterData.h b/Source/core/dom/CharacterData.h
index 2cc75d170ba11bfbb36e44f90b976703575334fc..425ec4247d9f414dada31b78e8e20c1767b83220 100644
--- a/Source/core/dom/CharacterData.h
+++ b/Source/core/dom/CharacterData.h
@@ -23,6 +23,7 @@
 #ifndef CharacterData_h
 #define CharacterData_h
 
+#include "core/CoreExport.h"
 #include "core/dom/Node.h"
 #include "wtf/text/WTFString.h"
 
@@ -30,7 +31,7 @@ namespace blink {
 
 class ExceptionState;
 
-class CharacterData : public Node {
+class CORE_EXPORT CharacterData : public Node {
     DEFINE_WRAPPERTYPEINFO();
 public:
     void atomize();