Introduce accessors on builtins instance

src/arm/deoptimizer-arm.cc

Index: src/arm/deoptimizer-arm.cc
diff --git a/src/arm/deoptimizer-arm.cc b/src/arm/deoptimizer-arm.cc
index f1fde9223e0384fa37fc3190b7fc86c5cb529088..883586e25f7707eabd7bce8e9edd61666345bb38 100644
--- a/src/arm/deoptimizer-arm.cc
+++ b/src/arm/deoptimizer-arm.cc
@@ -106,7 +106,7 @@ 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;
 
@@ -316,8 +316,7 @@ void Deoptimizer::DoComputeOsrOutputFrame() {
         optimized_code_->entry() + pc_offset);
     output_[0]->SetPc(pc);
   }
-  Code* continuation = Isolate::Current()->builtins()->builtin(
-    Builtins::NotifyOSR);
+  Code* continuation = isolate_->builtins()->builtin(Builtins::NotifyOSR);
   output_[0]->SetContinuation(
       reinterpret_cast<uint32_t>(continuation->entry()));