[turbofan] Factor out the function specific part from the frame state operator.

src/compiler/instruction.cc

 // Copyright 2014 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/compiler/common-operator.h"
 #include "src/compiler/graph.h"
 #include "src/compiler/instruction.h"
 #include "src/compiler/schedule.h"
 
 namespace v8 {
@@ skipping 703 matching lines @@
     ++count;
   }
   return count;
 }
 
 
 size_t FrameStateDescriptor::GetJSFrameCount() const {
   size_t count = 0;
   for (const FrameStateDescriptor* iter = this; iter != NULL;
        iter = iter->outer_state_) {
-    if (iter->type_ == JS_FRAME) {
+    if (iter->type_ == FrameStateType::kJavaScriptFunction) {
       ++count;
     }
   }
   return count;
 }
 
 
 MachineType FrameStateDescriptor::GetType(size_t index) const {
   return types_[index];
 }
@@ skipping 70 matching lines @@
       os << " B" << succ.ToInt();
     }
     os << "\n";
   }
   return os;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8