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

src/mips64/assembler-mips64.cc

Index: src/mips64/assembler-mips64.cc
diff --git a/src/mips64/assembler-mips64.cc b/src/mips64/assembler-mips64.cc
index e44b4294dd62b5d3ac05480158d7cf109ebe6e31..61b72968a6b66f6677260b78f387816874747a7c 100644
--- a/src/mips64/assembler-mips64.cc
+++ b/src/mips64/assembler-mips64.cc
@@ -3066,11 +3066,10 @@ void Assembler::emit_code_stub_address(Code* stub) {
 void Assembler::RecordRelocInfo(RelocInfo::Mode rmode, intptr_t data) {
   // We do not try to reuse pool constants.
   RelocInfo rinfo(pc_, rmode, data, NULL);
-  if (rmode >= RelocInfo::JS_RETURN &&
+  if (rmode >= RelocInfo::COMMENT &&
       rmode <= RelocInfo::DEBUG_BREAK_SLOT_AT_CONSTRUCT_CALL) {
     // Adjust code for new modes.
     DCHECK(RelocInfo::IsDebugBreakSlot(rmode)
-           || RelocInfo::IsJSReturn(rmode)
            || RelocInfo::IsComment(rmode)
            || RelocInfo::IsPosition(rmode));
     // These modes do not need an entry in the constant pool.