Revert of [debugger] remove debugger statement support from FCG/CS.

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 6c6b73f62698aa8b1202e938a7b24b884b73a7ae..538cbc24302b421f0cea2163bbee578e16dbec4c 100644
--- a/src/mips/macro-assembler-mips.h
+++ b/src/mips/macro-assembler-mips.h
@@ -1080,9 +1080,13 @@
                         Register scratch,
                         Label* fail);
 
-  // Frame restart support.
+  // -------------------------------------------------------------------------
+  // Debugger Support.
+
+  void DebugBreak();
   void MaybeDropFrames();
 
+  // -------------------------------------------------------------------------
   // Exception handling.
 
   // Push a new stack handler and link into stack handler chain.