description: add constexpr to methods where it is required
author: Michael Gilbert <mgilbert@debian.org>

--- a/third_party/blink/renderer/core/animation/animation_time_delta.h
+++ b/third_party/blink/renderer/core/animation/animation_time_delta.h
@@ -53,7 +53,7 @@ class CORE_EXPORT AnimationTimeDelta {
     return AnimationTimeDelta(std::numeric_limits<double>::infinity());
   }
 
-  double InSecondsF() const { return delta_; }
+  constexpr double InSecondsF() const { return delta_; }
   double InMillisecondsF() const { return delta_ * 1000; }
 
   bool is_max() const {
--- a/third_party/blink/renderer/core/layout/ng/inline/ng_baseline.cc
+++ b/third_party/blink/renderer/core/layout/ng/inline/ng_baseline.cc
@@ -11,7 +11,7 @@
 namespace blink {
 
 const unsigned NGBaselineRequest::kTypeIdCount;
-const LayoutUnit NGBaselineList::kEmptyOffset;
+constexpr LayoutUnit NGBaselineList::kEmptyOffset;
 
 bool NGBaselineRequest::operator==(const NGBaselineRequest& other) const {
   return algorithm_type_ == other.algorithm_type_ &&