A64: Synchronize with r16679.

src/a64/debug-a64.cc

Index: src/a64/debug-a64.cc
diff --git a/src/a64/debug-a64.cc b/src/a64/debug-a64.cc
index 1ffa933a899b34af003038e9383780a035646b84..b25e6ecae44eaaed3ecb3001929c3e002e4b2746 100644
--- a/src/a64/debug-a64.cc
+++ b/src/a64/debug-a64.cc
@@ -66,7 +66,8 @@ void BreakLocationIterator::SetDebugBreakAtReturn() {
   // sequence.
   STATIC_ASSERT(Assembler::kJSRetSequenceInstructions >= 5);
   PatchingAssembler patcher(reinterpret_cast<Instruction*>(rinfo()->pc()), 5);
-  byte* entry = Isolate::Current()->debug()->debug_break_return()->entry();
+  byte* entry =
+      debug_info_->GetIsolate()->debug()->debug_break_return()->entry();
 
   // The first instruction of a patched return sequence must be a load literal
   // loading the address of the debug break return code.
@@ -124,7 +125,8 @@ void BreakLocationIterator::SetDebugBreakAtSlot() {
   // sequence.
   STATIC_ASSERT(Assembler::kDebugBreakSlotInstructions >= 4);
   PatchingAssembler patcher(reinterpret_cast<Instruction*>(rinfo()->pc()), 4);
-  byte* entry = Isolate::Current()->debug()->debug_break_slot()->entry();
+  byte* entry =
+      debug_info_->GetIsolate()->debug()->debug_break_slot()->entry();
 
   // The first instruction of a patched debug break slot must be a load literal
   // loading the address of the debug break slot code.