--- chromium-70.0.3534.4/third_party/blink/renderer/core/animation/animation_time_delta.h.gcc8	2018-08-28 06:11:07.000000000 +0200
+++ chromium-70.0.3534.4/third_party/blink/renderer/core/animation/animation_time_delta.h	2018-09-03 01:38:14.169583523 +0200
@@ -53,7 +53,7 @@
     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 {
--- chromium-87.0.4280.40/base/allocator/partition_allocator/partition_alloc_constants.h.gcc10	2020-10-29 23:25:25.000000000 +0100
+++ chromium-87.0.4280.40/base/allocator/partition_allocator/partition_alloc_constants.h	2020-10-31 13:49:33.927557580 +0100
@@ -228,13 +228,13 @@ static const size_t kMinBucketedOrder =
 #endif
 // The largest bucketed order is 1 << (20 - 1), storing [512 KiB, 1 MiB):
 static const size_t kMaxBucketedOrder = 20;
-static const size_t kNumBucketedOrders =
+static constexpr size_t kNumBucketedOrders =
     (kMaxBucketedOrder - kMinBucketedOrder) + 1;
 // Eight buckets per order (for the higher orders), e.g. order 8 is 128, 144,
 // 160, ..., 240:
 static const size_t kNumBucketsPerOrderBits = 3;
-static const size_t kNumBucketsPerOrder = 1 << kNumBucketsPerOrderBits;
-static const size_t kNumBuckets = kNumBucketedOrders * kNumBucketsPerOrder;
+static constexpr size_t kNumBucketsPerOrder = 1 << kNumBucketsPerOrderBits;
+static constexpr size_t kNumBuckets = kNumBucketedOrders * kNumBucketsPerOrder;
 static const size_t kSmallestBucket = 1 << (kMinBucketedOrder - 1);
 static const size_t kMaxBucketSpacing =
     1 << ((kMaxBucketedOrder - 1) - kNumBucketsPerOrderBits);
--- chromium-81.0.4044.43/base/optional.h.gcc9	2020-03-04 22:52:54.000000000 +0100
+++ chromium-81.0.4044.43/base/optional.h	2020-03-09 22:17:26.085324956 +0100
@@ -239,7 +239,7 @@ class OptionalBase {
     return *this;
   }
 
-  OptionalBase& operator=(OptionalBase&& other) noexcept(
+  constexpr OptionalBase& operator=(OptionalBase&& other) noexcept(
       std::is_nothrow_move_assignable<T>::value&&
           std::is_nothrow_move_constructible<T>::value) {
     MoveAssign(std::move(other));
--- chromium-84.0.4147.89/third_party/blink/renderer/core/geometry/dom_rect_read_only.h.gcc10	2020-07-13 20:40:42.000000000 +0200
+++ chromium-84.0.4147.89/third_party/blink/renderer/core/geometry/dom_rect_read_only.h	2020-07-21 11:31:14.373939459 +0200
@@ -31,10 +31,10 @@ class CORE_EXPORT DOMRectReadOnly : publ
 
   DOMRectReadOnly(double x, double y, double width, double height);
 
-  double x() const { return x_; }
-  double y() const { return y_; }
-  double width() const { return width_; }
-  double height() const { return height_; }
+  constexpr double x() const { return x_; }
+  constexpr double y() const { return y_; }
+  constexpr double width() const { return width_; }
+  constexpr double height() const { return height_; }
 
   double top() const { return geometry_util::NanSafeMin(y_, y_ + height_); }
   double right() const { return geometry_util::NanSafeMax(x_, x_ + width_); }