[stubs] Port LoadScriptContextFieldStub and StoreScriptContextFieldStub to TurboFan.

src/crankshaft/hydrogen.h

 // 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.
 
 #ifndef V8_CRANKSHAFT_HYDROGEN_H_
 #define V8_CRANKSHAFT_HYDROGEN_H_
 
 #include "src/accessors.h"
 #include "src/allocation.h"
 #include "src/ast/ast-type-bounds.h"
@@ skipping 1842 matching lines @@
   void BuildCreateAllocationMemento(HValue* previous_object,
                                     HValue* previous_object_size,
                                     HValue* payload);
 
   HInstruction* BuildConstantMapCheck(Handle<JSObject> constant);
   HInstruction* BuildCheckPrototypeMaps(Handle<JSObject> prototype,
                                         Handle<JSObject> holder);
 
   HInstruction* BuildGetNativeContext(HValue* closure);
   HInstruction* BuildGetNativeContext();
-  HInstruction* BuildGetScriptContext(int context_index);
+
   // Builds a loop version if |depth| is specified or unrolls the loop to
   // |depth_value| iterations otherwise.
   HValue* BuildGetParentContext(HValue* depth, int depth_value);
 
   HInstruction* BuildGetArrayFunction();
   HValue* BuildArrayBufferViewFieldAccessor(HValue* object,
                                             HValue* checked_object,
                                             FieldIndex index);
 
 
@@ skipping 1167 matching lines @@
   }
 
  private:
   HOptimizedGraphBuilder* builder_;
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_CRANKSHAFT_HYDROGEN_H_