Debugger: use debug break slots to break at function exit.

src/ia32/macro-assembler-ia32.h

Index: src/ia32/macro-assembler-ia32.h
diff --git a/src/ia32/macro-assembler-ia32.h b/src/ia32/macro-assembler-ia32.h
index 5ad8410bab0cdfb38c6114552b0d44eb99157b88..d4d4fd6b90b44966c9c60be8519b7ddeff12f61e 100644
--- a/src/ia32/macro-assembler-ia32.h
+++ b/src/ia32/macro-assembler-ia32.h
@@ -1025,7 +1025,7 @@ class MacroAssembler: public Assembler {
 class CodePatcher {
  public:
   CodePatcher(byte* address, int size);
-  virtual ~CodePatcher();
+  ~CodePatcher();
 
   // Macro assembler to emit code.
   MacroAssembler* masm() { return &masm_; }