will-change on SVG elements should not reset transforms.

Source/core/css/resolver/StyleAdjuster.cpp

Index: Source/core/css/resolver/StyleAdjuster.cpp
diff --git a/Source/core/css/resolver/StyleAdjuster.cpp b/Source/core/css/resolver/StyleAdjuster.cpp
index 733e50a61fb46c2684ba9ef0e8434d79e1581285..e29fdf03ef71b87111c81581b1b3ec5a47037bc1 100644
--- a/Source/core/css/resolver/StyleAdjuster.cpp
+++ b/Source/core/css/resolver/StyleAdjuster.cpp
@@ -197,7 +197,7 @@ void StyleAdjuster::adjustComputedStyle(ComputedStyle& style, const ComputedStyl
 
     // will-change:transform should result in the same rendering behavior as having a transform,
     // including the creation of a containing block for fixed position descendants.
-    if (!style.hasTransform() && (style.willChangeProperties().contains(CSSPropertyWebkitTransform) || style.willChangeProperties().contains(CSSPropertyTransform))) {
+    if (!e->isSVGElement() && !style.hasTransform() && (style.willChangeProperties().contains(CSSPropertyWebkitTransform) || style.willChangeProperties().contains(CSSPropertyTransform))) {

[pdr., 2015/04/10 04:55:11]

This will crash when e is null so you'll need an extra check for that case.

Because we also check e->isSVGElement below, lets move this into a local
variable:
bool isSVGElement = e && e->isSVGElement();
You can use this in the svg check below (line 231).

Lets also add a comment:
// will-change:transform should result in the same rendering behavior as having
a transform,
// including the creation of a containing block for fixed position descendants.
SVG elements
// can skip this because they implicitly have transforms.
bool isSVGElement = e && e->isSVGElement();
if (!isSVGElement && !style.hasTransform() && (style.wil... etc

         bool makeIdentity = true;
         style.setTransform(TransformOperations(makeIdentity));
     }