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

src/mips/macro-assembler-mips.h

Index: src/mips/macro-assembler-mips.h
diff --git a/src/mips/macro-assembler-mips.h b/src/mips/macro-assembler-mips.h
index 39cd547373fb243049733cf6864eb935b948b6fc..667de79e07753dbdbf114a6d0fed8c0894668de3 100644
--- a/src/mips/macro-assembler-mips.h
+++ b/src/mips/macro-assembler-mips.h
@@ -1703,7 +1703,7 @@ class CodePatcher {
   CodePatcher(byte* address,
               int instructions,
               FlushICache flush_cache = FLUSH);
-  virtual ~CodePatcher();
+  ~CodePatcher();
 
   // Macro assembler to emit code.
   MacroAssembler* masm() { return &masm_; }