Re-introduce printers for Node, Position, PositionAnchorType in GTest

Source/core/dom/Node.h

Index: Source/core/dom/Node.h
diff --git a/Source/core/dom/Node.h b/Source/core/dom/Node.h
index 7a9d06632f33b7ac2fcd757c22fad242af1655c3..55e4336694b398a4240209fe667de1a8d5ce22b0 100644
--- a/Source/core/dom/Node.h
+++ b/Source/core/dom/Node.h
@@ -897,6 +897,9 @@ PassRefPtrWillBeRawPtr<T> T::create(Document& document) \
     return adoptRefWillBeNoop(new T(document)); \
 }
 
+std::ostream& operator<<(std::ostream&, const Node&);

[tkent, 2015/08/26 05:08:37]

Please add a comment that these functions are for testing, and implementations
are in CoreTestPrinters.cpp.

[yosin_UTC9, 2015/08/26 05:36:52]

Done.

+std::ostream& operator<<(std::ostream&, const Node*);
+
 } // namespace blink
 
 #ifndef NDEBUG