Replace OStream with std::ostream.

src/compiler/x64/instruction-selector-x64-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"
 #include "src/compiler/node-matchers.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
@@ skipping 90 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, kX64Movsxbl, kX64Movb},
     {kMachUint8, kX64Movzxbl, kX64Movb},
     {kMachInt16, kX64Movsxwl, kX64Movw},
     {kMachUint16, kX64Movzxwl, kX64Movw},
     {kMachInt32, kX64Movl, kX64Movl},
     {kMachUint32, kX64Movl, kX64Movl},
@@ skipping 172 matching lines @@
 namespace {
 
 struct MultParam {
   int value;
   bool lea_expected;
   AddressingMode addressing_mode;
 };
 
 
 std::ostream& operator<<(std::ostream& os, const MultParam& m) {
-  OStringStream ost;
-  ost << m.value << "." << m.lea_expected << "." << m.addressing_mode;
-  return os << ost.c_str();
+  return os << m.value << "." << m.lea_expected << "." << m.addressing_mode;
 }
 
 
 const MultParam kMultParams[] = {{-1, false, kMode_None},
                                  {0, false, kMode_None},
                                  {1, true, kMode_M1},
                                  {2, true, kMode_M2},
                                  {3, true, kMode_MR2},
                                  {4, true, kMode_M4},
                                  {5, true, kMode_MR4},
@@ skipping 70 matching lines @@
   }
 }
 
 
 INSTANTIATE_TEST_CASE_P(InstructionSelectorTest, InstructionSelectorMultTest,
                         ::testing::ValuesIn(kMultParams));
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8