Add early out in SMIL 'next progress time' search

As soon as we get a progress time that isn't "in the future" we can
terminate the search.

Bug: 998526
Change-Id: Ic5bea2235ba6337dc9a7759438700716a865b651
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1798608
Commit-Queue: Fredrik Söderquist <fs@opera.com>
Reviewed-by: Philip Rogers <pdr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#695967}

third_party/blink/renderer/core/svg/animation/smil_animation_sandwich.cc

@@ -85,6 +85,8 @@ SMILTime SMILAnimationSandwich::NextProgressTime(
   for (const auto& animation : sandwich_) {
     earliest_progress_time = std::min(
         earliest_progress_time, animation->NextProgressTime(presentation_time));
+    if (earliest_progress_time <= presentation_time)
+      break;
   }
   return earliest_progress_time;
 }

third_party/blink/renderer/core/svg/animation/smil_time_container.cc

@@ -424,9 +424,11 @@ void SMILTimeContainer::UpdateAnimationsAndScheduleFrameIfNeeded(
   ApplyAnimationValues(elapsed);
 
   SMILTime next_progress_time = SMILTime::Unresolved();
-  for (auto& sandwich : scheduled_animations_) {
+  for (auto& sandwich : scheduled_animations_.Values()) {
     next_progress_time =
-        std::min(next_progress_time, sandwich.value->NextProgressTime(elapsed));
+        std::min(next_progress_time, sandwich->NextProgressTime(elapsed));
+    if (next_progress_time <= elapsed)
+      break;
   }
 
   if (!CanScheduleFrame(next_progress_time))

third_party/blink/renderer/core/svg/animation/svg_smil_element.cc

@@ -1057,7 +1057,7 @@ SMILTime SVGSMILElement::NextProgressTime(double presentation_time) const {
         return repeating_duration_end;
       return interval_.end;
     }
-    return presentation_time + 0.025;
+    return presentation_time;
   }
   return interval_.begin >= presentation_time ? interval_.begin
                                               : SMILTime::Unresolved();