[turbofan] Cleanup duplicated/unused code in InstructionSelector.

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 <list>
 #include <queue>
 #include <stack>
 #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)
+  ZoneVector(size_t 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)
+  ZoneVector(size_t 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>> {
  public:
   // Constructs an empty deque.
@@ skipping 38 matching lines @@
 
 
 // Typedefs to shorten commonly used vectors.
 typedef ZoneVector<bool> BoolVector;
 typedef ZoneVector<int> IntVector;
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_ZONE_CONTAINERS_H_