diff -up chromium-76.0.3809.100/remoting/signaling/message_tracker.cc.gcc-constexpr chromium-76.0.3809.100/remoting/signaling/message_tracker.cc
--- chromium-76.0.3809.100/remoting/signaling/message_tracker.cc.gcc-constexpr	2019-08-09 16:48:08.000000000 +0200
+++ chromium-76.0.3809.100/remoting/signaling/message_tracker.cc	2019-08-20 21:29:14.545465656 +0200
@@ -9,8 +9,7 @@
 namespace remoting {
 
 // static
-const base::TimeDelta MessageTracker::kCleanupInterval =
-    base::TimeDelta::FromMinutes(2);
+constexpr base::TimeDelta MessageTracker::kCleanupInterval;
 
 MessageTracker::MessageTracker() = default;
 
diff -up chromium-76.0.3809.100/remoting/signaling/message_tracker.h.gcc-constexpr chromium-76.0.3809.100/remoting/signaling/message_tracker.h
--- chromium-76.0.3809.100/remoting/signaling/message_tracker.h.gcc-constexpr	2019-08-20 22:02:25.625970954 +0200
+++ chromium-76.0.3809.100/remoting/signaling/message_tracker.h	2019-08-20 21:28:23.371952434 +0200
@@ -36,7 +36,8 @@ class MessageTracker final {
 
   // All IDs older than now - kCleanupInterval will be eventually removed, but
   // they are not guaranteed to be immediately removed after the interval.
-  static const base::TimeDelta kCleanupInterval;
+  static constexpr base::TimeDelta kCleanupInterval =
+      base::TimeDelta::FromMinutes(2);
 
   void RemoveExpiredIds();
 
diff -up chromium-76.0.3809.100/remoting/signaling/message_tracker_unittest.cc.gcc-constexpr chromium-76.0.3809.100/remoting/signaling/message_tracker_unittest.cc