Fix method naming in SequenceCheckerImpl::Core to match SequenceCheckerImpl::CalledOnValidSequence()

BUG=676387

Review-Url: https://codereview.chromium.org/2788613004
Cr-Commit-Position: refs/heads/master@{#460946}
diff --git a/base/sequence_checker_impl.cc b/base/sequence_checker_impl.cc
index df2a8cb2..6a9b5b2 100644
--- a/base/sequence_checker_impl.cc
+++ b/base/sequence_checker_impl.cc
@@ -26,7 +26,7 @@
 
   ~Core() = default;
 
-  bool CalledOnValidThread() const {
+  bool CalledOnValidSequence() const {
     if (sequence_token_.IsValid())
       return sequence_token_ == SequenceToken::GetForCurrentThread();
 
@@ -58,7 +58,7 @@
   AutoLock auto_lock(lock_);
   if (!core_)
     core_ = MakeUnique<Core>();
-  return core_->CalledOnValidThread();
+  return core_->CalledOnValidSequence();
 }
 
 void SequenceCheckerImpl::DetachFromSequence() {