Remove RunMixin from base::Callback implementation

base/callback_unittest.cc

Index: base/callback_unittest.cc
diff --git a/base/callback_unittest.cc b/base/callback_unittest.cc
index a41736946a13f5f6c9b6c3d1492c0a93d153c476..455c2740e6922e263b35a4d0a5df7e4ee509fd72 100644
--- a/base/callback_unittest.cc
+++ b/base/callback_unittest.cc
@@ -148,6 +148,23 @@ TEST_F(CallbackTest, ResetAndReturn) {
   ASSERT_TRUE(tfr.cb_already_run);
 }
 
+TEST_F(CallbackTest, NullAfterMoveRun) {
+  Closure cb = Bind([] {});
+  ASSERT_TRUE(cb);
+  std::move(cb).Run();
+  ASSERT_FALSE(cb);
+
+  const Closure cb2 = Bind([] {});
+  ASSERT_TRUE(cb2);
+  std::move(cb2).Run();
+  ASSERT_TRUE(cb2);
+
+  OnceClosure cb3 = BindOnce([] {});
+  ASSERT_TRUE(cb3);
+  std::move(cb3).Run();
+  ASSERT_FALSE(cb3);
+}
+
 class CallbackOwner : public base::RefCounted<CallbackOwner> {
  public:
   explicit CallbackOwner(bool* deleted) {