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

Source/core/dom/Range.h

Index: Source/core/dom/Range.h
diff --git a/Source/core/dom/Range.h b/Source/core/dom/Range.h
index 78cb01fbd8809a5525b50ab90bae19ae0fa6c064..49a5e33e04ae3582a9a6d44fd2ba304650174415 100644
--- a/Source/core/dom/Range.h
+++ b/Source/core/dom/Range.h
@@ -182,9 +182,9 @@ private:
     RangeBoundaryPoint m_end;
 };
 
-PassRefPtrWillBeRawPtr<Range> rangeOfContents(Node*);
+CORE_EXPORT PassRefPtrWillBeRawPtr<Range> rangeOfContents(Node*);
 
-bool areRangesEqual(const Range*, const Range*);
+CORE_EXPORT bool areRangesEqual(const Range*, const Range*);
 
 } // namespace blink