Debugger: record reloc info for debug break slot immediate before the slot.

src/x64/debug-x64.cc

Index: src/x64/debug-x64.cc
diff --git a/src/x64/debug-x64.cc b/src/x64/debug-x64.cc
index c7acf9824a5de4e7c9c935e17db3048da7f6e9b9..d14588f1be9aa1fe5155af84a764db7925730c44 100644
--- a/src/x64/debug-x64.cc
+++ b/src/x64/debug-x64.cc
@@ -145,10 +145,13 @@ void DebugCodegen::GenerateReturnDebugBreak(MacroAssembler* masm) {
 }
 
 
-void DebugCodegen::GenerateSlot(MacroAssembler* masm) {
+void DebugCodegen::GenerateSlot(MacroAssembler* masm,
+                                DebugCodegen::SlotLocation location,
+                                int call_argc) {
   // Generate enough nop's to make space for a call instruction.
   Label check_codesize;
   __ bind(&check_codesize);
+  RecordRelocInfo(masm, location, call_argc);
   __ Nop(Assembler::kDebugBreakSlotLength);
   DCHECK_EQ(Assembler::kDebugBreakSlotLength,
             masm->SizeOfCodeGeneratedSince(&check_codesize));