Support arbitrary length units for the z component of CSS property "translate"

third_party/WebKit/Source/core/css/resolver/StyleBuilderConverter.cpp

Index: third_party/WebKit/Source/core/css/resolver/StyleBuilderConverter.cpp
diff --git a/third_party/WebKit/Source/core/css/resolver/StyleBuilderConverter.cpp b/third_party/WebKit/Source/core/css/resolver/StyleBuilderConverter.cpp
index a6f2fbfc2932999d27d826b4bf618ed730c24e7d..721b3e52a7d3688ee5889ae8e085f612e1c20743 100644
--- a/third_party/WebKit/Source/core/css/resolver/StyleBuilderConverter.cpp
+++ b/third_party/WebKit/Source/core/css/resolver/StyleBuilderConverter.cpp
@@ -911,7 +911,7 @@ PassRefPtr<TranslateTransformOperation> StyleBuilderConverter::convertTranslate(
     if (list.length() >= 2)
         ty = convertLength(state, *list.item(1));
     if (list.length() == 3)
-        tz = toCSSPrimitiveValue(list.item(2))->getDoubleValue();
+        tz = toCSSPrimitiveValue(list.item(2))->computeLength<double>(state.cssToLengthConversionData());
 
     return TranslateTransformOperation::create(tx, ty, tz, TransformOperation::Translate3D);
 }