[turbofan] remove some of the dependency of Instruction on Schedule

src/zone-containers.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_ZONE_CONTAINERS_H_
 #define V8_ZONE_CONTAINERS_H_
 
 #include <deque>
 #include <queue>
 #include <vector>
 
 #include "src/zone-allocator.h"
 
 namespace v8 {
 namespace internal {
 
 // A wrapper subclass for std::vector to make it easy to construct one
 // that uses a zone allocator.
 template <typename T>
 class ZoneVector : public std::vector<T, zone_allocator<T> > {
  public:
   // Constructs an empty vector.
   explicit ZoneVector(Zone* zone)
       : std::vector<T, zone_allocator<T> >(zone_allocator<T>(zone)) {}
 
   // Constructs a new vector and fills it with {size} elements, each
+  // constructed via the default constructor.
+  ZoneVector(int size, Zone* zone)
+      : std::vector<T, zone_allocator<T> >(size, T(), zone_allocator<T>(zone)) {
+  }
+
+  // Constructs a new vector and fills it with {size} elements, each
   // having the value {def}.
   ZoneVector(int size, T def, Zone* zone)
       : std::vector<T, zone_allocator<T> >(size, def, zone_allocator<T>(zone)) {
   }
 };
 
 // A wrapper subclass std::deque to make it easy to construct one
 // that uses a zone allocator.
 template <typename T>
 class ZoneDeque : public std::deque<T, zone_allocator<T> > {
@@ skipping 12 matching lines @@
       : std::queue<T, std::deque<T, zone_allocator<T> > >(
             std::deque<T, zone_allocator<T> >(zone_allocator<T>(zone))) {}
 };
 
 // Typedefs to shorten commonly used vectors.
 typedef ZoneVector<bool> BoolVector;
 typedef ZoneVector<int> IntVector;
 } }  // namespace v8::internal
 
 #endif  // V8_ZONE_CONTAINERS_H_