Replace OStream with std::ostream.

src/property.h

 // 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.
 
 #ifndef V8_PROPERTY_H_
 #define V8_PROPERTY_H_
 
+#include <iosfwd>
+
 #include "src/factory.h"
 #include "src/field-index.h"
 #include "src/field-index-inl.h"
 #include "src/isolate.h"
 #include "src/types.h"
 
 namespace v8 {
 namespace internal {
 
-class OStream;
-
 // Abstraction for elements in instance-descriptor arrays.
 //
 // Each descriptor has a key, property attributes, property type,
 // property index (in the actual instance-descriptor array) and
 // optionally a piece of data.
 class Descriptor BASE_EMBEDDED {
  public:
   void KeyToUniqueName() {
     if (!key_->IsUniqueName()) {
       key_ = key_->GetIsolate()->factory()->InternalizeString(
@@ skipping 34 matching lines @@
              int field_index = 0)
       : key_(key),
         value_(value),
         details_(attributes, type, representation, field_index) { }
 
   friend class DescriptorArray;
   friend class Map;
 };
 
 
-OStream& operator<<(OStream& os, const Descriptor& d);
+std::ostream& operator<<(std::ostream& os, const Descriptor& d);
 
 
 class FieldDescriptor FINAL : public Descriptor {
  public:
   FieldDescriptor(Handle<Name> key,
                   int field_index,
                   PropertyAttributes attributes,
                   Representation representation)
       : Descriptor(key, HeapType::Any(key->GetIsolate()), attributes,
                    FIELD, representation, field_index) {}
@@ skipping 158 matching lines @@
   // Where did we find the result;
   enum { NOT_FOUND, DESCRIPTOR_TYPE, TRANSITION_TYPE } lookup_type_;
 
   JSReceiver* holder_;
   Map* transition_;
   int number_;
   PropertyDetails details_;
 };
 
 
-OStream& operator<<(OStream& os, const LookupResult& r);
+std::ostream& operator<<(std::ostream& os, const LookupResult& r);
 } }  // namespace v8::internal
 
 #endif  // V8_PROPERTY_H_