A64: Synchronize with r18642.

src/execution.h

Index: src/execution.h
diff --git a/src/execution.h b/src/execution.h
index df842b8838cf2202eb475b15b5fc0147d0563082..329b9f729405eef3f89aae13a9ddb83185db4341 100644
--- a/src/execution.h
+++ b/src/execution.h
@@ -44,7 +44,8 @@ enum InterruptFlag {
   GC_REQUEST = 1 << 5,
   FULL_DEOPT = 1 << 6,
   INSTALL_CODE = 1 << 7,
-  API_INTERRUPT = 1 << 8
+  API_INTERRUPT = 1 << 8,
+  DEOPT_MARKED_CODE = 1 << 9
 };
 
 
@@ -221,6 +222,8 @@ class StackGuard {
   void RequestInstallCode();
   bool IsFullDeopt();
   void FullDeopt();
+  bool IsDeoptMarkedCode();
+  void DeoptMarkedCode();
   void Continue(InterruptFlag after_what);
 
   void RequestInterrupt(InterruptCallback callback, void* data);