Replacing SurfaceReferenceBase and SequenceSurfaceReference with Closures

base/callback_unittest.cc

Index: base/callback_unittest.cc
diff --git a/base/callback_unittest.cc b/base/callback_unittest.cc
index 783f3bad4f5fb90e70cc6d9e0df0b08411a4c5e9..a41736946a13f5f6c9b6c3d1492c0a93d153c476 100644
--- a/base/callback_unittest.cc
+++ b/base/callback_unittest.cc
@@ -115,6 +115,17 @@ TEST_F(CallbackTest, Reset) {
   EXPECT_TRUE(callback_a_.Equals(null_callback_));
 }
 
+TEST_F(CallbackTest, Move) {
+  // Moving should reset the callback.
+  ASSERT_FALSE(callback_a_.is_null());
+  ASSERT_FALSE(callback_a_.Equals(null_callback_));
+
+  auto tmp = std::move(callback_a_);
+
+  EXPECT_TRUE(callback_a_.is_null());
+  EXPECT_TRUE(callback_a_.Equals(null_callback_));
+}
+
 struct TestForReentrancy {
   TestForReentrancy()
       : cb_already_run(false),