X64: enable stack sampling in profiler.

src/x64/codegen-x64.h

 // Copyright 2009 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 516 matching lines @@
   void GenerateSetValueOf(ZoneList<Expression*>* args);
 
   // Fast support for charCodeAt(n).
   void GenerateFastCharCodeAt(ZoneList<Expression*>* args);
 
   // Fast support for object equality testing.
   void GenerateObjectEquals(ZoneList<Expression*>* args);
 
   void GenerateLog(ZoneList<Expression*>* args);
 
+  void GenerateGetFramePointer(ZoneList<Expression*>* args);
+
   // Fast support for Math.random().
   void GenerateRandomPositiveSmi(ZoneList<Expression*>* args);
 
   // Fast support for Math.sin and Math.cos.
   enum MathOp { SIN, COS };
   void GenerateFastMathOp(MathOp op, ZoneList<Expression*>* args);
   inline void GenerateMathSin(ZoneList<Expression*>* args);
   inline void GenerateMathCos(ZoneList<Expression*>* args);
 
   // Methods used to indicate which source code is generated for. Source
@@ skipping 39 matching lines @@
   // in a spilled state.
   bool in_spilled_code_;
 
   static InlineRuntimeLUT kInlineRuntimeLUT[];
 
   friend class VirtualFrame;
   friend class JumpTarget;
   friend class Reference;
   friend class Result;
 
+  friend class CodeGeneratorPatcher;  // Used in test-log-stack-tracer.cc
+
   DISALLOW_COPY_AND_ASSIGN(CodeGenerator);
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_X64_CODEGEN_X64_H_