Support compositing for active animations in SPv2.

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/html/HTMLIFrameElement.h"
 #include "core/layout/LayoutTestHelper.h"
 #include "core/layout/LayoutTreeAsText.h"
 #include "core/layout/api/LayoutViewItem.h"
 #include "core/paint/ObjectPaintProperties.h"
 #include "core/paint/PaintPropertyTreePrinter.h"
@@ skipping 386 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,
+       TransformNodeWithActiveAnimationHasDirectCompositingReason) {
+  setBodyInnerHTML(
+      "<style>"
+      "@keyframes test {"
+      "  0% { transform: translate(1em, 1em) } "
+      "  100% { transform: translate(2em, 2em) } "
+      "} "
+      "</style>"
+      "<div id='transform' "
+      "    style='animation-name: test; animation-duration: 1s'>"
+      "</div>");
+
+  Element* transform = document().getElementById("transform");
+  const ObjectPaintProperties* transformProperties =
+      transform->layoutObject()->paintProperties();
+  EXPECT_TRUE(transformProperties->transform()->hasDirectCompositingReasons());
+}
+
 TEST_P(PaintPropertyTreeBuilderTest, WillChangeTransform) {
   setBodyInnerHTML(
       "<style> body { margin: 0 } </style>"
       "<div id='transform' style='margin-left: 50px; margin-top: 100px;"
       "    width: 400px; height: 300px;"
       "    will-change: transform'>"
       "</div>");
 
   Element* transform = document().getElementById("transform");
   const ObjectPaintProperties* transformProperties =
@@ skipping 2860 matching lines @@
 
   auto* iframeContainer = document().getElementById("iframeContainer");
   iframeContainer->setAttribute(HTMLNames::styleAttr, "visibility: hidden;");
   frameView->updateAllLifecyclePhases();
 
   EXPECT_EQ(nullptr, frameScroll(frameView));
   EXPECT_EQ(nullptr, frameScroll(childFrameView));
 }
 
 }  // namespace blink