[iOS] Add TODO bugs for cleanup of iOS runtime version checks

Bug: 1129482, 1129483, 1129484
Change-Id: Ic512a5f00bff81d1210b1a003ab3429dd30318a1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2416894
Commit-Queue: Mike Dougherty <michaeldo@chromium.org>
Commit-Queue: Nico Weber <thakis@chromium.org>
Auto-Submit: Mike Dougherty <michaeldo@chromium.org>
Reviewed-by: Nico Weber <thakis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#807952}

base/ios/ios_util.h

@@ -14,12 +14,15 @@ namespace base {
 namespace ios {
 
 // Returns whether the operating system is iOS 12 or later.
+// TODO(crbug.com/1129482): Remove once minimum supported version is at least 12
 BASE_EXPORT bool IsRunningOnIOS12OrLater();
 
 // Returns whether the operating system is iOS 13 or later.
+// TODO(crbug.com/1129483): Remove once minimum supported version is at least 13
 BASE_EXPORT bool IsRunningOnIOS13OrLater();
 
 // Returns whether the operating system is iOS 14 or later.
+// TODO(crbug.com/1129484): Remove once minimum supported version is at least 14
 BASE_EXPORT bool IsRunningOnIOS14OrLater();
 
 // Returns whether the operating system is at the given version or later.