Add Callback::IsCancelled

base/bind_unittest.cc

Index: base/bind_unittest.cc
diff --git a/base/bind_unittest.cc b/base/bind_unittest.cc
index ba0358e5699cba33fdb202551e4f1204d95042c5..a38035caaaa8485317411b51a62ae4d55f162aaa 100644
--- a/base/bind_unittest.cc
+++ b/base/bind_unittest.cc
@@ -1034,6 +1034,28 @@ TEST_F(BindTest, CapturelessLambda) {
   EXPECT_EQ(42, x);
 }
 
+TEST_F(BindTest, Cancellation) {
+  EXPECT_CALL(no_ref_, VoidMethod0()).Times(2);
+
+  WeakPtrFactory<NoRef> weak_factory(&no_ref_);
+  Closure cb = Bind(&NoRef::VoidMethod0, weak_factory.GetWeakPtr());
+  Closure cb2 = Bind(cb);
+
+  EXPECT_FALSE(cb.IsCancelled());
+  EXPECT_FALSE(cb2.IsCancelled());
+
+  cb.Run();
+  cb2.Run();
+
+  weak_factory.InvalidateWeakPtrs();
+
+  EXPECT_TRUE(cb.IsCancelled());
+  EXPECT_TRUE(cb2.IsCancelled());
+
+  cb.Run();
+  cb2.Run();
+}
+
 // Callback construction and assignment tests.
 //   - Construction from an InvokerStorageHolder should not cause ref/deref.
 //   - Assignment from other callback should only cause one ref