[turbofan] remove schedule from InstructionSequence

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>
 
@@ skipping 164 matching lines @@
 
   Successors successors_;
   Predecessors predecessors_;
   Id id_;
 
   DISALLOW_COPY_AND_ASSIGN(BasicBlock);
 };
 
 std::ostream& operator<<(std::ostream& os, const BasicBlock::Control& c);
 std::ostream& operator<<(std::ostream& os, const BasicBlock::Id& id);
+std::ostream& operator<<(std::ostream& os, const BasicBlock::RpoNumber& rpo);
 
 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 62 matching lines @@
   BasicBlock* end_;
 };
 
 std::ostream& operator<<(std::ostream& os, const Schedule& s);
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_SCHEDULE_H_