Simplify application of perspective origin.

LayoutTests/platform/win/compositing/overflow/universal-accelerated-overflow-scroll-expected.txt

Index: LayoutTests/platform/win/compositing/overflow/universal-accelerated-overflow-scroll-expected.txt
diff --git a/LayoutTests/platform/win/compositing/overflow/universal-accelerated-overflow-scroll-expected.txt b/LayoutTests/platform/win/compositing/overflow/universal-accelerated-overflow-scroll-expected.txt
index cf784662ee074a3c40216f8898bdba76611a6ea0..5ed8efb099646f371b866d6fe3df906b416508a3 100644
--- a/LayoutTests/platform/win/compositing/overflow/universal-accelerated-overflow-scroll-expected.txt
+++ b/LayoutTests/platform/win/compositing/overflow/universal-accelerated-overflow-scroll-expected.txt
@@ -20,11 +20,10 @@
                   "children": [
                     {
                       "bounds": [85, 144],
-                      "shouldFlattenTransform": false,
                       "drawsContent": true,
                       "children": [
                         {
-                          "shouldFlattenTransform": false
+
                         }
                       ]
                     }
@@ -86,11 +85,10 @@
               "children": [
                 {
                   "bounds": [105, 144],
-                  "shouldFlattenTransform": false,
                   "drawsContent": true,
                   "children": [
                     {
-                      "shouldFlattenTransform": false
+
                     }
                   ]
                 }
@@ -148,10 +146,9 @@
                   "children": [
                     {
                       "bounds": [85, 144],
-                      "shouldFlattenTransform": false,
                       "children": [
                         {
-                          "shouldFlattenTransform": false
+
                         }
                       ]
                     }
@@ -216,11 +213,10 @@
                   "children": [
                     {
                       "bounds": [85, 144],
-                      "shouldFlattenTransform": false,
                       "drawsContent": true,
                       "children": [
                         {
-                          "shouldFlattenTransform": false
+
                         }
                       ]
                     }
@@ -282,11 +278,10 @@
               "children": [
                 {
                   "bounds": [105, 144],
-                  "shouldFlattenTransform": false,
                   "drawsContent": true,
                   "children": [
                     {
-                      "shouldFlattenTransform": false
+
                     }
                   ]
                 }
@@ -344,10 +339,9 @@
                   "children": [
                     {
                       "bounds": [85, 144],
-                      "shouldFlattenTransform": false,
                       "children": [
                         {
-                          "shouldFlattenTransform": false
+
                         }
                       ]
                     }
@@ -409,10 +403,9 @@
               "children": [
                 {
                   "bounds": [105, 144],
-                  "shouldFlattenTransform": false,
                   "children": [
                     {
-                      "shouldFlattenTransform": false
+
                     }
                   ]
                 }
@@ -467,10 +460,9 @@
               "children": [
                 {
                   "bounds": [105, 144],
-                  "shouldFlattenTransform": false,
                   "children": [
                     {
-                      "shouldFlattenTransform": false
+
                     }
                   ]
                 }
@@ -525,11 +517,10 @@
               "children": [
                 {
                   "bounds": [85, 144],
-                  "shouldFlattenTransform": false,
                   "drawsContent": true,
                   "children": [
                     {
-                      "shouldFlattenTransform": false
+
                     }
                   ]
                 }
@@ -591,10 +582,9 @@
               "children": [
                 {
                   "bounds": [85, 144],
-                  "shouldFlattenTransform": false,
                   "children": [
                     {
-                      "shouldFlattenTransform": false
+
                     }
                   ]
                 }
@@ -656,11 +646,10 @@
               "children": [
                 {
                   "bounds": [85, 144],
-                  "shouldFlattenTransform": false,
                   "drawsContent": true,
                   "children": [
                     {
-                      "shouldFlattenTransform": false
+
                     }
                   ]
                 }
@@ -722,10 +711,9 @@
               "children": [
                 {
                   "bounds": [85, 144],
-                  "shouldFlattenTransform": false,
                   "children": [
                     {
-                      "shouldFlattenTransform": false
+
                     }
                   ]
                 }