Replace OStream with std::ostream.

src/compiler/node.h

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_COMPILER_NODE_H_
 #define V8_COMPILER_NODE_H_
 
 #include <deque>
 #include <set>
 #include <vector>
@@ skipping 43 matching lines @@
 
   void Initialize(const Operator* op) { set_op(op); }
 
   bool IsDead() const { return InputCount() > 0 && InputAt(0) == NULL; }
   void Kill();
 
   void CollectProjections(ZoneVector<Node*>* projections);
   Node* FindProjection(size_t projection_index);
 };
 
-OStream& operator<<(OStream& os, const Node& n);
+std::ostream& operator<<(std::ostream& os, const Node& n);
 
 typedef GenericGraphVisit::NullNodeVisitor<NodeData, Node> NullNodeVisitor;
 
 typedef std::set<Node*, std::less<Node*>, zone_allocator<Node*> > NodeSet;
 typedef NodeSet::iterator NodeSetIter;
 typedef NodeSet::reverse_iterator NodeSetRIter;
 
 typedef ZoneVector<Node*> NodeVector;
 typedef NodeVector::iterator NodeVectorIter;
 typedef NodeVector::const_iterator NodeVectorConstIter;
@@ skipping 10 matching lines @@
 template <typename T>
 static inline const T& OpParameter(const Node* node) {
   return OpParameter<T>(node->op());
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_NODE_H_