Introduce accessors on builtins instance

src/ia32/deoptimizer-ia32.cc

Index: src/ia32/deoptimizer-ia32.cc
diff --git a/src/ia32/deoptimizer-ia32.cc b/src/ia32/deoptimizer-ia32.cc
index 4eaf7fee58bc591446ac51792a58dc8dd118e7b6..73ca9cec40deab186ac01d6d99facab5edad23bd 100644
--- a/src/ia32/deoptimizer-ia32.cc
+++ b/src/ia32/deoptimizer-ia32.cc
@@ -123,7 +123,7 @@ void Deoptimizer::DeoptimizeFunction(JSFunction* function) {
 
   // Add the deoptimizing code to the list.
   DeoptimizingCodeListNode* node = new DeoptimizingCodeListNode(code);
-  DeoptimizerData* data = Isolate::Current()->deoptimizer_data();
+  DeoptimizerData* data = code->GetIsolate()->deoptimizer_data();
   node->set_next(data->deoptimizing_code_list_);
   data->deoptimizing_code_list_ = node;
 
@@ -325,7 +325,7 @@ void Deoptimizer::DoComputeOsrOutputFrame() {
     output_[0]->SetPc(pc);
   }
   Code* continuation =
-      Isolate::Current()->builtins()->builtin(Builtins::NotifyOSR);
+      function->GetIsolate()->builtins()->builtin(Builtins::NotifyOSR);
   output_[0]->SetContinuation(
       reinterpret_cast<uint32_t>(continuation->entry()));