Refactoring: Make emit_debug_code flag handling architecture-independent.

src/x64/assembler-x64.h

Index: src/x64/assembler-x64.h
diff --git a/src/x64/assembler-x64.h b/src/x64/assembler-x64.h
index f77be7a9d0f7c3c2de60bb028c2170e74eb54a7d..5f9e147e5ed624c7bc089d3fb591c9e467e8c0bf 100644
--- a/src/x64/assembler-x64.h
+++ b/src/x64/assembler-x64.h
@@ -558,9 +558,6 @@ class Assembler : public AssemblerBase {
   Assembler(Isolate* isolate, void* buffer, int buffer_size);
   ~Assembler();
 
-  // Overrides the default provided by FLAG_debug_code.
-  void set_emit_debug_code(bool value) { emit_debug_code_ = value; }
-
   // GetCode emits any pending (non-emitted) code and fills the descriptor
   // desc. GetCode() is idempotent; it returns the same result if no other
   // Assembler functions are invoked in between GetCode() calls.
@@ -1444,9 +1441,6 @@ class Assembler : public AssemblerBase {
   byte byte_at(int pos)  { return buffer_[pos]; }
   void set_byte_at(int pos, byte value) { buffer_[pos] = value; }
 
- protected:
-  bool emit_debug_code() const { return emit_debug_code_; }
-
  private:
   byte* addr_at(int pos)  { return buffer_ + pos; }
   uint32_t long_at(int pos)  {
@@ -1648,9 +1642,6 @@ class Assembler : public AssemblerBase {
   List< Handle<Code> > code_targets_;
 
   PositionsRecorder positions_recorder_;
-
-  bool emit_debug_code_;
-
   friend class PositionsRecorder;
 };