[runtime] Rename {JSGeneratorObject::operand_stack} field.

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index c59beab8be3d72eeb8afc87ffdc603771eec6749..1a1f5fd26437ea9e2b3a51915102251ef4e2d3d9 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -8076,8 +8076,8 @@ class JSGeneratorObject: public JSObject {
   // is suspended.
   int source_position() const;
 
-  // [operand_stack]: Saved operand stack.
-  DECL_ACCESSORS(operand_stack, FixedArray)
+  // [register_file]: Saved interpreter register file.
+  DECL_ACCESSORS(register_file, FixedArray)
 
   DECLARE_CAST(JSGeneratorObject)
 
@@ -8095,8 +8095,8 @@ class JSGeneratorObject: public JSObject {
   static const int kInputOrDebugPosOffset = kReceiverOffset + kPointerSize;
   static const int kResumeModeOffset = kInputOrDebugPosOffset + kPointerSize;
   static const int kContinuationOffset = kResumeModeOffset + kPointerSize;
-  static const int kOperandStackOffset = kContinuationOffset + kPointerSize;
-  static const int kSize = kOperandStackOffset + kPointerSize;
+  static const int kRegisterFileOffset = kContinuationOffset + kPointerSize;
+  static const int kSize = kRegisterFileOffset + kPointerSize;
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(JSGeneratorObject);