Replace OStream with std::ostream.

src/compiler/node.cc

 // 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.
 
 #include "src/compiler/node.h"
 
 #include "src/compiler/generic-node-inl.h"
 
 namespace v8 {
 namespace internal {
@@ skipping 24 matching lines @@
   for (UseIter i = uses().begin(); i != uses().end(); ++i) {
     if ((*i)->opcode() == IrOpcode::kProjection &&
         OpParameter<size_t>(*i) == projection_index) {
       return *i;
     }
   }
   return NULL;
 }
 
 
-OStream& operator<<(OStream& os, const Operator& op) { return op.PrintTo(os); }
+std::ostream& operator<<(std::ostream& os, const Operator& op) {
+  return op.PrintTo(os);
+}
 
 
-OStream& operator<<(OStream& os, const Node& n) {
+std::ostream& operator<<(std::ostream& os, const Node& n) {
   os << n.id() << ": " << *n.op();
   if (n.op()->InputCount() != 0) {
     os << "(";
     for (int i = 0; i < n.op()->InputCount(); ++i) {
       if (i != 0) os << ", ";
       os << n.InputAt(i)->id();
     }
     os << ")";
   }
   return os;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8