Minor cleanup: use handle when setting instructions in code object.

runtime/vm/precompiler.cc

 // Copyright (c) 2015, 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/precompiler.h"
 
 #include "vm/aot_optimizer.h"
 #include "vm/assembler.h"
 #include "vm/ast_printer.h"
 #include "vm/branch_optimizer.h"
@@ skipping 2324 matching lines @@
     }
 
     void Visit(const Function& function) {
       if (!function.HasCode()) {
         ASSERT(function.HasImplicitClosureFunction());
         return;
       }
       code_ = function.CurrentCode();
       instructions_ = code_.instructions();
       instructions_ = DedupOneInstructions(instructions_);
-      code_.SetActiveInstructions(instructions_.raw());
-      code_.set_instructions(instructions_.raw());
+      code_.SetActiveInstructions(instructions_);
+      code_.set_instructions(instructions_);
       function.SetInstructions(code_);  // Update cached entry point.
     }
 
     RawInstructions* DedupOneInstructions(const Instructions& instructions) {
       const Instructions* canonical_instructions =
           canonical_instructions_set_.LookupValue(&instructions);
       if (canonical_instructions == NULL) {
         canonical_instructions_set_.Insert(
             &Instructions::ZoneHandle(zone_, instructions.raw()));
         return instructions.raw();
@@ skipping 983 matching lines @@
 
   ASSERT(FLAG_precompiled_mode);
   const bool optimized = function.IsOptimizable();  // False for natives.
   DartPrecompilationPipeline pipeline(zone, field_type_map);
   return PrecompileFunctionHelper(&pipeline, function, optimized);
 }
 
 #endif  // DART_PRECOMPILER
 
 }  // namespace dart