Replace OStream with std::ostream.

test/cctest/compiler/test-gap-resolver.cc

 // Copyright 2014 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/gap-resolver.h"
 
 #include "src/base/utils/random-number-generator.h"
 #include "test/cctest/cctest.h"
 
 using namespace v8::internal;
@@ skipping 40 matching lines @@
   }
 
   static Key KeyFor(const InstructionOperand* op) {
     return Key(op->kind(), op->index());
   }
 
   static Value ValueFor(const InstructionOperand* op) {
     return Value(op->kind(), op->index());
   }
 
-  friend OStream& operator<<(OStream& os, const InterpreterState& is) {
+  friend std::ostream& operator<<(std::ostream& os,
+                                  const InterpreterState& is) {
     for (OperandMap::const_iterator it = is.values_.begin();
          it != is.values_.end(); ++it) {
       if (it != is.values_.begin()) os << " ";
       InstructionOperand source(it->first.first, it->first.second);
       InstructionOperand destination(it->second.first, it->second.second);
       os << MoveOperands(&source, &destination);
     }
     return os;
   }
 
@@ skipping 92 matching lines @@
       mi1.AssembleParallelMove(pm);
 
       MoveInterpreter mi2;
       GapResolver resolver(&mi2);
       resolver.Resolve(pm);
 
       CHECK(mi1.state() == mi2.state());
     }
   }
 }