Simplify ConvertValueFromPercentageToUserUnits in svg_length_context.cc

We know what viewport dimension to use up front, so we can just pass
that directly rather than calling DimensionForLengthMode().

Change-Id: I59484a91ae986a5b3b0b47352886c450dcd828d7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2624667
Commit-Queue: Stephen Chenney <schenney@chromium.org>
Auto-Submit: Fredrik Söderquist <fs@opera.com>
Reviewed-by: Stephen Chenney <schenney@chromium.org>
Cr-Commit-Position: refs/heads/master@{#842733}

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

@@ -50,11 +50,10 @@ static inline float DimensionForLengthMode(SVGLengthMode mode,
   return 0;
 }
 
-static float ConvertValueFromPercentageToUserUnits(
-    const SVGLength& value,
-    const FloatSize& viewport_size) {
-  return CSSPrimitiveValue::ClampToCSSLengthRange(value.ScaleByPercentage(
-      DimensionForLengthMode(value.UnitMode(), viewport_size)));
+static float ConvertValueFromPercentageToUserUnits(const SVGLength& value,
+                                                   float viewport_dimension) {
+  return CSSPrimitiveValue::ClampToCSSLengthRange(
+      value.ScaleByPercentage(viewport_dimension));
 }
 
 static const ComputedStyle* ComputedStyleForLengthResolving(
@@ -168,12 +167,13 @@ FloatRect SVGLengthContext::ResolveRectangle(const SVGElement* context,
                                              const SVGLength& height) {
   DCHECK_NE(SVGUnitTypes::kSvgUnitTypeUnknown, type);
   if (type != SVGUnitTypes::kSvgUnitTypeUserspaceonuse) {
-    const FloatSize& viewport_size = viewport.Size();
     return FloatRect(
-        ConvertValueFromPercentageToUserUnits(x, viewport_size) + viewport.X(),
-        ConvertValueFromPercentageToUserUnits(y, viewport_size) + viewport.Y(),
-        ConvertValueFromPercentageToUserUnits(width, viewport_size),
-        ConvertValueFromPercentageToUserUnits(height, viewport_size));
+        ConvertValueFromPercentageToUserUnits(x, viewport.Width()) +
+            viewport.X(),
+        ConvertValueFromPercentageToUserUnits(y, viewport.Height()) +
+            viewport.Y(),
+        ConvertValueFromPercentageToUserUnits(width, viewport.Width()),
+        ConvertValueFromPercentageToUserUnits(height, viewport.Height()));
   }
 
   SVGLengthContext length_context(context);