A64: Synchronize with r16024.

src/isolate.h

Index: src/isolate.h
diff --git a/src/isolate.h b/src/isolate.h
index 7d923502f13ba30c3078d3130f288db60edcce2d..17d436e2effbbb5670a81442a3d22238882b97d8 100644
--- a/src/isolate.h
+++ b/src/isolate.h
@@ -741,6 +741,7 @@ class Isolate {
   void PrintStackTrace(FILE* out, char* thread_data);
   void PrintStack(StringStream* accumulator);
   void PrintStack(FILE* out);
+  void PrintStack();
   Handle<String> StackTraceString();
   NO_INLINE(void PushStackTraceAndDie(unsigned int magic,
                                       Object* object,
@@ -1064,6 +1065,13 @@ class Isolate {
     thread_local_top_.top_lookup_result_ = top;
   }
 
+  bool context_exit_happened() {
+    return context_exit_happened_;
+  }
+  void set_context_exit_happened(bool context_exit_happened) {
+    context_exit_happened_ = context_exit_happened;
+  }
+
   bool initialized_from_snapshot() { return initialized_from_snapshot_; }
 
   double time_millis_since_init() {
@@ -1311,6 +1319,10 @@ class Isolate {
   unibrow::Mapping<unibrow::Ecma262Canonicalize> interp_canonicalize_mapping_;
   CodeStubInterfaceDescriptor* code_stub_interface_descriptors_;
 
+  // The garbage collector should be a little more aggressive when it knows
+  // that a context was recently exited.
+  bool context_exit_happened_;
+
   // True if this isolate was initialized from a snapshot.
   bool initialized_from_snapshot_;