Clean up stack guard interrupts.

src/runtime.cc

Index: src/runtime.cc
diff --git a/src/runtime.cc b/src/runtime.cc
index b82d377f71fda4040cdcb5784c0f14744a64f42b..643fd997ea92120c7b074c746471a1ebbeb8dfcd 100644
--- a/src/runtime.cc
+++ b/src/runtime.cc
@@ -9585,7 +9585,7 @@ RUNTIME_FUNCTION(RuntimeHidden_StackGuard) {
     return isolate->StackOverflow();
   }
 
-  return Execution::HandleStackGuardInterrupt(isolate);
+  return isolate->stack_guard()->HandleInterrupts();
 }
 
 
@@ -9609,7 +9609,7 @@ RUNTIME_FUNCTION(RuntimeHidden_TryInstallOptimizedCode) {
 RUNTIME_FUNCTION(RuntimeHidden_Interrupt) {
   SealHandleScope shs(isolate);
   ASSERT(args.length() == 0);
-  return Execution::HandleStackGuardInterrupt(isolate);
+  return isolate->stack_guard()->HandleInterrupts();
 }
 
 
@@ -10782,7 +10782,8 @@ RUNTIME_FUNCTION(Runtime_LookupAccessor) {
 RUNTIME_FUNCTION(Runtime_DebugBreak) {
   SealHandleScope shs(isolate);
   ASSERT(args.length() == 0);
-  return Execution::DebugBreakHelper(isolate);
+  Execution::DebugBreakHelper(isolate);
+  return isolate->heap()->undefined_value();
 }
 
 
@@ -10819,7 +10820,7 @@ RUNTIME_FUNCTION(Runtime_SetDebugEventListener) {
 RUNTIME_FUNCTION(Runtime_Break) {
   SealHandleScope shs(isolate);
   ASSERT(args.length() == 0);
-  isolate->stack_guard()->DebugBreak();
+  isolate->stack_guard()->RequestDebugBreak();
   return isolate->heap()->undefined_value();
 }