Replace OStream with std::ostream.

src/compiler/ia32/instruction-selector-ia32-unittest.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/instruction-selector-unittest.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
@@ skipping 128 matching lines @@
 namespace {
 
 struct MemoryAccess {
   MachineType type;
   ArchOpcode load_opcode;
   ArchOpcode store_opcode;
 };
 
 
 std::ostream& operator<<(std::ostream& os, const MemoryAccess& memacc) {
-  OStringStream ost;
-  ost << memacc.type;
-  return os << ost.c_str();
+  return os << memacc.type;
 }
 
 
 static const MemoryAccess kMemoryAccesses[] = {
     {kMachInt8, kIA32Movsxbl, kIA32Movb},
     {kMachUint8, kIA32Movzxbl, kIA32Movb},
     {kMachInt16, kIA32Movsxwl, kIA32Movw},
     {kMachUint16, kIA32Movzxwl, kIA32Movw},
     {kMachInt32, kIA32Movl, kIA32Movl},
     {kMachUint32, kIA32Movl, kIA32Movl},
@@ skipping 258 matching lines @@
       Node* base = bases[i];
       Node* index = indices[j];
       Run(base, index, kMode_MI);
     }
   }
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8