Make some static helpers into member functions.

runtime/vm/flow_graph_optimizer.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/flow_graph_optimizer.h"
 
 #include "vm/bit_vector.h"
 #include "vm/cha.h"
 #include "vm/flow_graph_builder.h"
 #include "vm/hash_map.h"
@@ skipping 2179 matching lines @@
     SetValue(instr, non_constant_);
   } else if (IsConstant(left) && IsConstant(right)) {
     if (left.IsSmi() && right.IsSmi()) {
       switch (instr->op_kind()) {
         case Token::kADD:
         case Token::kSUB:
         case Token::kMUL:
         case Token::kTRUNCDIV:
         case Token::kMOD: {
           const Object& result =
-              Integer::ZoneHandle(Integer::BinaryOp(instr->op_kind(),
-                                                    Smi::Cast(left),
-                                                    Smi::Cast(right)));
+              Integer::ZoneHandle(Smi::Cast(left).BinaryOp(instr->op_kind(),
+                                                           Smi::Cast(right)));
           SetValue(instr, result);
           break;
         }
         default:
           // TODO(kmillikin): support other smi operations.
           SetValue(instr, non_constant_);
       }
     } else {
       // TODO(kmillikin): support other types.
       SetValue(instr, non_constant_);
@@ skipping 247 matching lines @@
        it.Advance()) {
     JoinEntryInstr* join = it.Current()->AsJoinEntry();
     if (join != NULL) join->EliminateUnreachablePhiInputs();
   }
 
   graph_->ComputeUseLists();
 }
 
 
 }  // namespace dart