Replace OStream with std::ostream.

src/compiler/schedule.h

 // 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.
 
 #ifndef V8_COMPILER_SCHEDULE_H_
 #define V8_COMPILER_SCHEDULE_H_
 
+#include <iosfwd>
 #include <vector>
 
 #include "src/v8.h"
 
 #include "src/compiler/node.h"
 #include "src/compiler/opcodes.h"
 #include "src/zone.h"
 
 namespace v8 {
 namespace internal {
@@ skipping 139 matching lines @@
   Node* control_input_;      // Input value for control.
   NodeVector nodes_;         // nodes of this block in forward order.
 
   Successors successors_;
   Predecessors predecessors_;
   Id id_;
 
   DISALLOW_COPY_AND_ASSIGN(BasicBlock);
 };
 
-OStream& operator<<(OStream& os, const BasicBlock::Control& c);
-OStream& operator<<(OStream& os, const BasicBlock::Id& id);
+std::ostream& operator<<(std::ostream& os, const BasicBlock::Control& c);
+std::ostream& operator<<(std::ostream& os, const BasicBlock::Id& id);
 
 typedef ZoneVector<BasicBlock*> BasicBlockVector;
 typedef BasicBlockVector::iterator BasicBlockVectorIter;
 typedef BasicBlockVector::reverse_iterator BasicBlockVectorRIter;
 
 // A schedule represents the result of assigning nodes to basic blocks
 // and ordering them within basic blocks. Prior to computing a schedule,
 // a graph has no notion of control flow ordering other than that induced
 // by the graph's dependencies. A schedule is required to generate code.
 class Schedule FINAL : public ZoneObject {
@@ skipping 54 matching lines @@
   void SetBlockForNode(BasicBlock* block, Node* node);
 
   Zone* zone_;
   BasicBlockVector all_blocks_;           // All basic blocks in the schedule.
   BasicBlockVector nodeid_to_block_;      // Map from node to containing block.
   BasicBlockVector rpo_order_;            // Reverse-post-order block list.
   BasicBlock* start_;
   BasicBlock* end_;
 };
 
-OStream& operator<<(OStream& os, const Schedule& s);
-}
-}
-}  // namespace v8::internal::compiler
+std::ostream& operator<<(std::ostream& os, const Schedule& s);
+
+}  // namespace compiler
+}  // namespace internal
+}  // namespace v8
 
 #endif  // V8_COMPILER_SCHEDULE_H_