Bug 1156456 patch 2 - Transform the z component just like the x and y. r=birtles

I confirmed locally that this patch fixes the reftest (per reftest.list
change).

gfx/layers/composite/AsyncCompositionManager.cpp

@@ -413,9 +413,11 @@ SampleValue(float aPortion, Animation& aAnimation, StyleAnimationValue& aStart,
   Point3D transformOrigin = data.transformOrigin();
   transformOrigin.x = transformOrigin.x * cssPerDev;
   transformOrigin.y = transformOrigin.y * cssPerDev;
+  transformOrigin.z = transformOrigin.z * cssPerDev;
   Point3D perspectiveOrigin = data.perspectiveOrigin();
   perspectiveOrigin.x = perspectiveOrigin.x * cssPerDev;
   perspectiveOrigin.y = perspectiveOrigin.y * cssPerDev;
+  perspectiveOrigin.z = perspectiveOrigin.z * cssPerDev;
   nsDisplayTransform::FrameTransformProperties props(interpolatedList,
                                                      transformOrigin,
                                                      perspectiveOrigin,

layout/reftests/transform-3d/reftest.list

@@ -58,5 +58,5 @@ fuzzy-if(winWidget&&!layersGPUAccelerated,1,606) == scroll-perspective-1.html sc
 # Bugs
 fails-if(!layersGPUAccelerated) == 1035611-1.html 1035611-1-ref.html # Bug 1072898 for !layersGPUAccelerated failures
 == animate-cube.html animate-cube-ref.html
-fails == animate-cube-zoom.html animate-cube-zoom-ref.html # Bug 1156456
+fuzzy-if(/^Windows\x20NT\x206\.1/.test(http.oscpu)&&!layersGPUAccelerated,16,6) == animate-cube-zoom.html animate-cube-zoom-ref.html
 != animate-cube-ref.html animate-cube-zoom-ref.html