CSSTransitionDiscrete: Fix CounterRulesEqual

Instead of returning the value of base::ranges::equal, the initial
implementation I merged of CounterRulesEqual was throwing away the
return value and unconditionally returning true.

Bug: 1399631, 1413556
Change-Id: I2df45579ddf02056ff48763772d55be7885460fd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4363281
Auto-Submit: Joey Arhar <[email protected]>
Reviewed-by: Mason Freed <[email protected]>
Commit-Queue: Joey Arhar <[email protected]>
Cr-Commit-Position: refs/heads/main@{#1121451}

css/css-lists/css-lists-no-interpolation.html

@@ -13,6 +13,12 @@
   to: 'add 123'
 });
 
+test_no_interpolation({
+  property: 'counter-increment',
+  from: 'add 5',
+  to: 'add 123'
+});
+
 test_no_interpolation({
   property: 'counter-reset',
   from: 'initial',