[debug] use catch prediction flag for promise rejections.

src/isolate.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_ISOLATE_H_
 #define V8_ISOLATE_H_
 
 #include <memory>
 #include <queue>
 #include <set>
@@ skipping 642 matching lines @@
   static int ArchiveSpacePerThread() { return sizeof(ThreadLocalTop); }
   void FreeThreadResources() { thread_local_top_.Free(); }
 
   // This method is called by the api after operations that may throw
   // exceptions.  If an exception was thrown and not handled by an external
   // handler the exception is scheduled to be rethrown when we return to running
   // JavaScript code.  If an exception is scheduled true is returned.
   bool OptionalRescheduleException(bool is_bottom_call);
 
   // Push and pop a promise and the current try-catch handler.
-  void PushPromise(Handle<JSObject> promise, Handle<JSFunction> function);
+  void PushPromise(Handle<JSObject> promise);
   void PopPromise();
   Handle<Object> GetPromiseOnStackOnThrow();
 
   class ExceptionScope {
    public:
     // Scope currently can only be used for regular exceptions,
     // not termination exception.
     inline explicit ExceptionScope(Isolate* isolate);
     inline ~ExceptionScope();
 
@@ skipping 755 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(Isolate);
 };
 
 
 #undef FIELD_ACCESSOR
 #undef THREAD_LOCAL_TOP_ACCESSOR
 
 
 class PromiseOnStack {
  public:
-  PromiseOnStack(Handle<JSFunction> function, Handle<JSObject> promise,
-                 PromiseOnStack* prev)
-      : function_(function), promise_(promise), prev_(prev) {}
-  Handle<JSFunction> function() { return function_; }
+  PromiseOnStack(Handle<JSObject> promise, PromiseOnStack* prev)
+      : promise_(promise), prev_(prev) {}
   Handle<JSObject> promise() { return promise_; }
   PromiseOnStack* prev() { return prev_; }
 
  private:
-  Handle<JSFunction> function_;
   Handle<JSObject> promise_;
   PromiseOnStack* prev_;
 };
 
 
 // If the GCC version is 4.1.x or 4.2.x an additional field is added to the
 // class as a work around for a bug in the generated code found with these
 // versions of GCC. See V8 issue 122 for details.
 class SaveContext BASE_EMBEDDED {
  public:
@@ skipping 184 matching lines @@
 
   EmbeddedVector<char, 128> filename_;
   FILE* file_;
   int scope_depth_;
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_ISOLATE_H_