Remove unnecessary Isolate::Current calls from hydrogen-instructions

src/hydrogen-instructions.cc

 // Copyright 2012 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.
 
 #include "src/v8.h"
 
 #include "src/base/bits.h"
 #include "src/double.h"
 #include "src/factory.h"
 #include "src/hydrogen-infer-representation.h"
@@ skipping 2958 matching lines @@
 
 std::ostream& HConstant::PrintDataTo(std::ostream& os) const {  // NOLINT
   if (HasInteger32Value()) {
     os << int32_value_ << " ";
   } else if (HasDoubleValue()) {
     os << double_value_ << " ";
   } else if (HasExternalReferenceValue()) {
     os << reinterpret_cast<void*>(external_reference_value_.address()) << " ";
   } else {
     // The handle() method is silently and lazily mutating the object.
-    Handle<Object> h = const_cast<HConstant*>(this)->handle(Isolate::Current());
+    Handle<Object> h = const_cast<HConstant*>(this)->handle(isolate());
     os << Brief(*h) << " ";
     if (HasStableMapValue()) os << "[stable-map] ";
     if (HasObjectMap()) os << "[map " << *ObjectMap().handle() << "] ";
   }
   if (!NotInNewSpace()) os << "[new space] ";
   return os;
 }
 
 
 std::ostream& HBinaryOperation::PrintDataTo(std::ostream& os) const {  // NOLINT
@@ skipping 1735 matching lines @@
       break;
     case HObjectAccess::kExternalMemory:
       os << "[external-memory]";
       break;
   }
 
   return os << "@" << access.offset();
 }
 
 } }  // namespace v8::internal