Fix typo.

Change-Id: I3448e3a73e84981cc1a4f2c22aabb0ec5cfa703c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2601893
Commit-Queue: Tal Pressman <talp@google.com>
Commit-Queue: Kentaro Hara <haraken@chromium.org>
Auto-Submit: Tal Pressman <talp@google.com>
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Cr-Commit-Position: refs/heads/master@{#839297}

third_party/blink/renderer/platform/heap/impl/member.h

@@ -348,7 +348,7 @@ class Member : public MemberBase<T, TracenessMemberConfiguration::kTraced> {
 // heap allocated objects.
 // However instead of creating a strong pointer to the object, the WeakMember
 // creates a weak pointer, which does not keep the pointee alive. Hence if all
-// pointers to to a heap allocated object are weak the object will be garbage
+// pointers to a heap allocated object are weak the object will be garbage
 // collected. At the time of GC the weak pointers will automatically be set to
 // null.
 template <typename T>