Move computation of 3D descendants to the descendant-dependent flags walk.

third_party/WebKit/Source/core/paint/PaintPropertyTreeBuilderTest.cpp

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/paint/PaintPropertyTreeBuilderTest.h"
 
 #include "core/html/HTMLIFrameElement.h"
 #include "core/layout/LayoutTreeAsText.h"
 #include "core/paint/ObjectPaintProperties.h"
 #include "core/paint/PaintPropertyTreePrinter.h"
@@ skipping 342 matching lines @@
   setBodyInnerHTML(
       "<style> body { margin: 0 } </style>"
       "<div id='transform' style='margin-left: 50px; margin-top: 100px;"
       "    width: 400px; height: 300px;"
       "    transform: translate3d(123px, 456px, 789px)'>"
       "</div>");
 
   Element* transform = document().getElementById("transform");
   const ObjectPaintProperties* transformProperties =
       transform->layoutObject()->paintProperties();
+
   EXPECT_EQ(TransformationMatrix().translate3d(123, 456, 789),
             transformProperties->transform()->matrix());
   EXPECT_EQ(FloatPoint3D(200, 150, 0),
             transformProperties->transform()->origin());
   EXPECT_EQ(transformProperties->paintOffsetTranslation(),
             transformProperties->transform()->parent());
   EXPECT_EQ(TransformationMatrix().translate(50, 100),
             transformProperties->paintOffsetTranslation()->matrix());
   EXPECT_EQ(frameScrollTranslation(),
             transformProperties->paintOffsetTranslation()->parent());
@@ skipping 14 matching lines @@
   transform->setAttribute(
       HTMLNames::styleAttr,
       "margin-left: 50px; margin-top: 100px; width: 400px; height: 300px; "
       "transform: translate3d(123px, 456px, 789px)");
   document().view()->updateAllLifecyclePhases();
   EXPECT_EQ(
       TransformationMatrix().translate3d(123, 456, 789),
       transform->layoutObject()->paintProperties()->transform()->matrix());
 }
 
+TEST_P(PaintPropertyTreeBuilderTest, Preserve3D3DTransformedDescendant) {
+  setBodyInnerHTML(
+      "<style> body { margin: 0 } </style>"
+      "<div id='preserve' style='transform-style: preserve-3d'>"
+      "<div id='transform' style='margin-left: 50px; margin-top: 100px;"
+      "    width: 400px; height: 300px;"
+      "    transform: translate3d(123px, 456px, 789px)'>"
+      "</div>"
+      "</div>");
+
+  Element* preserve = document().getElementById("preserve");
+  const ObjectPaintProperties* preserveProperties =
+      preserve->layoutObject()->paintProperties();
+
+  EXPECT_TRUE(preserveProperties->transform());
+  EXPECT_TRUE(preserveProperties->transform()->hasDirectCompositingReasons());
+}
+
+TEST_P(PaintPropertyTreeBuilderTest, Perspective3DTransformedDescendant) {
+  setBodyInnerHTML(
+      "<style> body { margin: 0 } </style>"
+      "<div id='perspective' style='perspective: 800px;'>"
+      "<div id='transform' style='margin-left: 50px; margin-top: 100px;"
+      "    width: 400px; height: 300px;"
+      "    transform: translate3d(123px, 456px, 789px)'>"
+      "</div>"
+      "</div>");
+
+  Element* perspective = document().getElementById("perspective");
+  const ObjectPaintProperties* perspectiveProperties =
+      perspective->layoutObject()->paintProperties();
+
+  EXPECT_TRUE(perspectiveProperties->transform());
+  EXPECT_TRUE(
+      perspectiveProperties->transform()->hasDirectCompositingReasons());
+}
+
 TEST_P(PaintPropertyTreeBuilderTest,
        TransformNodeWithActiveAnimationHasDirectCompositingReason) {
   setBodyInnerHTML(
       "<style>"
       "@keyframes test {"
       "  0% { transform: translate(1em, 1em) } "
       "  100% { transform: translate(2em, 2em) } "
       "} "
       ".animate { "
       "  animation-name: test; "
@@ skipping 2770 matching lines @@
   toElement(ancestor->node())
       ->setAttribute(HTMLNames::styleAttr, "position: static");
   document().view()->updateAllLifecyclePhases();
   EXPECT_NE(ancestor->paintProperties()->overflowClip(),
             descendant->paintProperties()
                 ->localBorderBoxProperties()
                 ->propertyTreeState.clip());
 }
 
 }  // namespace blink