Refactoring: Make emit_debug_code flag handling architecture-independent.

src/assembler.h

Index: src/assembler.h
diff --git a/src/assembler.h b/src/assembler.h
index 9d15b5110c2583ad10c73f252f49a55c338a3584..037799d6062ba434bcef8993071ea0ea937ca285 100644
--- a/src/assembler.h
+++ b/src/assembler.h
@@ -61,6 +61,9 @@ class AssemblerBase: public Malloced {
   Isolate* isolate() const { return isolate_; }
   int jit_cookie() const { return jit_cookie_; }
 
+  bool emit_debug_code() const { return emit_debug_code_; }
+  void set_emit_debug_code(bool value) { emit_debug_code_ = value; }
+
   bool predictable_code_size() const { return predictable_code_size_; }
   void set_predictable_code_size(bool value) { predictable_code_size_ = value; }
 
@@ -71,6 +74,7 @@ class AssemblerBase: public Malloced {
  private:
   Isolate* isolate_;
   int jit_cookie_;
+  bool emit_debug_code_;
   bool predictable_code_size_;
 };