Use clampTo<int> in SVGInteger::CalculateAnimatedValue

Matches what we do in SVGIntegerOptionalInteger::CalculateAnimatedValue,
and avoids undefined overflow.

Bug: 899445
Change-Id: I1250a05482713780f707301ed29e015fd81e65f2
Reviewed-on: https://chromium-review.googlesource.com/c/1304483Reviewed-by: Stephen Chenney <schenney@chromium.org>
Commit-Queue: Fredrik Söderquist <fs@opera.com>
Cr-Commit-Position: refs/heads/master@{#603548}

third_party/blink/renderer/core/svg/svg_integer.cc

@@ -79,7 +79,7 @@ void SVGInteger::CalculateAnimatedValue(SVGAnimationElement* animation_element,
   animation_element->AnimateAdditiveNumber(
       percentage, repeat_count, from_integer->Value(), to_integer->Value(),
       to_at_end_of_duration_integer->Value(), animated_float);
-  value_ = static_cast<int>(roundf(animated_float));
+  value_ = clampTo<int>(roundf(animated_float));
 }
 
 float SVGInteger::CalculateDistance(SVGPropertyBase* other, SVGElement*) {