Componentization: enable linking core and modules separately.

Source/core/editing/PositionWithAffinity.cpp

Index: Source/core/editing/PositionWithAffinity.cpp
diff --git a/Source/core/editing/PositionWithAffinity.cpp b/Source/core/editing/PositionWithAffinity.cpp
index 963b7d0a1fb964c8256ca41c63c490c6237548ff..428dc56c09836f1b6b82b30f069d833f4097bea5 100644
--- a/Source/core/editing/PositionWithAffinity.cpp
+++ b/Source/core/editing/PositionWithAffinity.cpp
@@ -33,7 +33,7 @@ bool PositionWithAffinityTemplate<PositionType>::operator==(const PositionWithAf
     return m_affinity == other.m_affinity && m_position == other.m_position;
 }
 
-template class CORE_EXTERN_TEMPLATE_EXPORT PositionWithAffinityTemplate<Position>;
-template class CORE_EXTERN_TEMPLATE_EXPORT PositionWithAffinityTemplate<PositionInComposedTree>;
+template class CORE_TEMPLATE_EXPORT PositionWithAffinityTemplate<Position>;
+template class CORE_TEMPLATE_EXPORT PositionWithAffinityTemplate<PositionInComposedTree>;
 
 } // namespace blink