Re-revert "Flush parallel recompilation queues on context dispose notification" (r15883).

src/isolate.h

Index: src/isolate.h
diff --git a/src/isolate.h b/src/isolate.h
index 894d25d6f0e4ebdabb44a0bd15ee2dcd1e5888b0..c0083177373e0afcd5f899cb92d46e236936dd59 100644
--- a/src/isolate.h
+++ b/src/isolate.h
@@ -1060,6 +1060,13 @@ 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() {
@@ -1307,6 +1314,10 @@ 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_;