Make ThreadChecker::CalledOnValidThread() return true when called from the same task.

base/BUILD.gn

Index: base/BUILD.gn
diff --git a/base/BUILD.gn b/base/BUILD.gn
index 6cc8c97226775053cf02b99780793f8c9c4cf18b..9059e6a537c9995cd8c4553ee72b5d93e02ee32b 100644
--- a/base/BUILD.gn
+++ b/base/BUILD.gn
@@ -678,11 +678,11 @@ component("base") {
     "scoped_native_library.cc",
     "scoped_native_library.h",
     "scoped_observer.h",
+    "sequence_and_task_token.cc",
+    "sequence_and_task_token.h",
     "sequence_checker.h",
     "sequence_checker_impl.cc",
     "sequence_checker_impl.h",
-    "sequence_token.cc",
-    "sequence_token.h",
     "sequenced_task_runner.cc",
     "sequenced_task_runner.h",
     "sequenced_task_runner_helpers.h",
@@ -1875,8 +1875,8 @@ test("base_unittests") {
     "scoped_generic_unittest.cc",
     "scoped_native_library_unittest.cc",
     "security_unittest.cc",
+    "sequence_and_task_token_unittest.cc",
     "sequence_checker_unittest.cc",
-    "sequence_token_unittest.cc",
     "sha1_unittest.cc",
     "stl_util_unittest.cc",
     "strings/nullable_string16_unittest.cc",