Fix PaintPropertyTreeBuilder for root layer scrolling.

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/layout/LayoutTestHelper.h"
 #include "core/layout/LayoutTreeAsText.h"
 #include "core/layout/api/LayoutViewItem.h"
 #include "core/paint/ObjectPaintProperties.h"
 #include "platform/graphics/paint/GeometryMapper.h"
 #include "platform/graphics/paint/TransformPaintPropertyNode.h"
 #include "platform/testing/UnitTestHelpers.h"
 #include "platform/text/TextStream.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "wtf/HashMap.h"
 #include "wtf/Vector.h"
 
 namespace blink {

[pdr., 2016/08/17 04:30:41]

This patch fails about 900 new LayoutTests when run with:
--additional-driver-flag=--enable-slimming-paint-v2
--additional-driver-flag=--root-layer-scrolls --retry-failures

There looks to be two classes of failures:
1) Nothing renders if a frame scrollbar is present
2) Random pixel differences--maybe a snapping difference somewhere?

[pdr., 2016/08/17 06:35:43]

I debugged the first issue down a bit. Because we're using a different main
GraphicsLayer now, we need to paint that GraphicsLayer and use its
PaintController.

Something like the following might work, or we could move around the
GraphicsLayers in the visual viewport.
+++ b/third_party/WebKit/Source/core/frame/FrameView.cpp
@@ -2663,6 +2663,13 @@ void FrameView::synchronizedPaint()
     ASSERT(!view.isNull());
     forAllNonThrottledFrameViews([](FrameView& frameView) {
frameView.lifecycle().advanceTo(DocumentLifecycle::InPaint); });
 
+    PaintLayer* layer = layoutViewItem().layer();
+    if (RuntimeEnabledFeatures::slimmingPaintV2Enabled() && layer &&
layer->hasCompositedLayerMapping()) {
+        if (GraphicsLayer* mainGraphicsLayer =
layer->compositedLayerMapping()->mainGraphicsLayer())
+            synchronizedPaintRecursively(mainGraphicsLayer);
+        if (GraphicsLayer* scrollingContentsLayer =
layer->compositedLayerMapping()->scrollingContentsLayer())
+            synchronizedPaintRecursively(scrollingContentsLayer);
+    }
     // A null graphics layer can occur for painting of SVG images that are not
parented into the main frame tree,
     // or when the FrameView is the main frame view of a page overlay. The page
overlay is in the layer tree of
     // the host page and will be painted during synchronized painting of the
host page.
@@ -2719,10 +2726,12 @@ void FrameView::pushPaintArtifactToCompositor()
     ASSERT(layer);
     if (!layer->hasCompositedLayerMapping())
         return;
-    GraphicsLayer* rootGraphicsLayer =
layer->compositedLayerMapping()->mainGraphicsLayer();
-    if (!rootGraphicsLayer->drawsContent())
+    GraphicsLayer* contentsLayer =
layer->compositedLayerMapping()->scrollingContentsLayer();
+    if (!contentsLayer)
+        contentsLayer = layer->compositedLayerMapping()->mainGraphicsLayer();
+    if (!contentsLayer || !contentsLayer->drawsContent())
         return;
-    const PaintArtifact& paintArtifact =
rootGraphicsLayer->getPaintController().paintArtifact();
+    const PaintArtifact& paintArtifact =
contentsLayer->getPaintController().paintArtifact();

 
-class PaintPropertyTreeBuilderTest : public RenderingTest {
+class PaintPropertyTreeBuilderTest
+    : public RenderingTest
+    , public ::testing::WithParamInterface<FrameSettingOverrideFunction> {

[pdr., 2016/08/17 04:30:41]

This approach of reusing the existing tests and adding
rootTransform/rootClip/etc is pretty cool

 public:
     PaintPropertyTreeBuilderTest()
         : RenderingTest(SingleChildFrameLoaderClient::create())
         , m_originalSlimmingPaintV2Enabled(RuntimeEnabledFeatures::slimmingPaintV2Enabled()) { }
 
     void loadTestData(const char* fileName)
     {
         String fullPath = testing::blinkRootDir();
         fullPath.append("/Source/core/paint/test_data/");
         fullPath.append(fileName);
         RefPtr<SharedBuffer> inputBuffer = testing::readFromFile(fullPath);
         setBodyInnerHTML(String(inputBuffer->data(), inputBuffer->size()));
     }
 
+    bool rootLayerScrolls()
+    {
+        return document().settings() && document().settings()->rootLayerScrolls();
+    }
+
+    const TransformPaintPropertyNode* rootTransform()
+    {
+        FrameView* frameView = document().view();
+        if (rootLayerScrolls())
+            return frameView->layoutView()->objectPaintProperties()->paintOffsetTranslation();
+        return frameView->rootTransform();
+    }
+
+    const ClipPaintPropertyNode* rootClip()
+    {
+        return rootLayerScrolls() ? nullptr : document().view()->rootClip();
+    }
+
+    const TransformPaintPropertyNode* framePreTranslation()
+    {
+        FrameView* frameView = document().view();
+        if (rootLayerScrolls())
+            return frameView->layoutView()->objectPaintProperties()->paintOffsetTranslation();
+        return frameView->preTranslation();
+    }
+
+    const TransformPaintPropertyNode* frameScrollTranslation()
+    {
+        FrameView* frameView = document().view();
+        if (rootLayerScrolls())
+            return frameView->layoutView()->objectPaintProperties()->scrollTranslation();
+        return frameView->scrollTranslation();
+    }
+
+    const ClipPaintPropertyNode* frameContentClip()
+    {
+        FrameView* frameView = document().view();
+        if (rootLayerScrolls())
+            return frameView->layoutView()->objectPaintProperties()->overflowClip();
+        return frameView->contentClip();
+    }
+
+    FrameSettingOverrideFunction settingOverrider() const override { return GetParam(); }
+
 private:
     void SetUp() override
     {
         RuntimeEnabledFeatures::setSlimmingPaintV2Enabled(true);
         Settings::setMockScrollbarsEnabled(true);
 
         RenderingTest::SetUp();
         enableCompositing();
     }
 
@@ skipping 22 matching lines @@
 \
     LayoutRect expected = sourceLayoutObject->localOverflowRectForPaintInvalidation(); \
     sourceLayoutObject->mapToVisualRectInAncestorSpace(ancestorLayoutObject, expected); \
     EXPECT_TRUE(expected.contains(LayoutRect(actual))); \
     actual.inflate(slopFactor); \
     EXPECT_TRUE(LayoutRect(actual).contains(expected)); \
 } while (0);
 
 #define CHECK_EXACT_VISUAL_RECT(sourceLayoutObject, ancestorLayoutObject) CHECK_VISUAL_RECT(sourceLayoutObject, ancestorLayoutObject, 0)
 
-TEST_F(PaintPropertyTreeBuilderTest, FixedPosition)
+INSTANTIATE_TEST_CASE_P(All, PaintPropertyTreeBuilderTest, ::testing::Values(nullptr, &RootLayerScrollsFrameSettingOverride));
+
+TEST_P(PaintPropertyTreeBuilderTest, FixedPosition)
 {
     loadTestData("fixed-position.html");
 
     FrameView* frameView = document().view();
 
     // target1 is a fixed-position element inside an absolute-position scrolling element.
     // It should be attached under the viewport to skip scrolling and offset of the parent.
     Element* target1 = document().getElementById("target1");
     const ObjectPaintProperties* target1Properties = target1->layoutObject()->objectPaintProperties();
     EXPECT_EQ(TransformationMatrix().translate(200, 150), target1Properties->paintOffsetTranslation()->matrix());
-    EXPECT_EQ(frameView->preTranslation(), target1Properties->paintOffsetTranslation()->parent());
+    EXPECT_EQ(framePreTranslation(), target1Properties->paintOffsetTranslation()->parent());
     EXPECT_EQ(target1Properties->paintOffsetTranslation(), target1Properties->overflowClip()->localTransformSpace());
     EXPECT_EQ(FloatRoundedRect(0, 0, 100, 100), target1Properties->overflowClip()->clipRect());
     // Likewise, it inherits clip from the viewport, skipping overflow clip of the scroller.
-    EXPECT_EQ(frameView->contentClip(), target1Properties->overflowClip()->parent());
+    EXPECT_EQ(frameContentClip(), target1Properties->overflowClip()->parent());
     CHECK_EXACT_VISUAL_RECT(target1->layoutObject(), frameView->layoutView());
 
     // target2 is a fixed-position element inside a transformed scrolling element.
     // It should be attached under the scrolled box of the transformed element.
     Element* target2 = document().getElementById("target2");
     const ObjectPaintProperties* target2Properties = target2->layoutObject()->objectPaintProperties();
     Element* scroller = document().getElementById("scroller");
     const ObjectPaintProperties* scrollerProperties = scroller->layoutObject()->objectPaintProperties();
     EXPECT_EQ(TransformationMatrix().translate(200, 150), target2Properties->paintOffsetTranslation()->matrix());
     EXPECT_EQ(scrollerProperties->scrollTranslation(), target2Properties->paintOffsetTranslation()->parent());
     EXPECT_EQ(target2Properties->paintOffsetTranslation(), target2Properties->overflowClip()->localTransformSpace());
     EXPECT_EQ(FloatRoundedRect(0, 0, 100, 100), target2Properties->overflowClip()->clipRect());
     EXPECT_EQ(scrollerProperties->overflowClip(), target2Properties->overflowClip()->parent());
     CHECK_EXACT_VISUAL_RECT(target2->layoutObject(), frameView->layoutView());
 }
 
-TEST_F(PaintPropertyTreeBuilderTest, PositionAndScroll)
+TEST_P(PaintPropertyTreeBuilderTest, PositionAndScroll)
 {
     loadTestData("position-and-scroll.html");
 
     Element* scroller = document().getElementById("scroller");
     scroller->scrollTo(0, 100);
     FrameView* frameView = document().view();
     frameView->updateAllLifecyclePhases();
     const ObjectPaintProperties* scrollerProperties = scroller->layoutObject()->objectPaintProperties();
     EXPECT_EQ(TransformationMatrix().translate(0, -100), scrollerProperties->scrollTranslation()->matrix());
-    EXPECT_EQ(frameView->scrollTranslation(), scrollerProperties->scrollTranslation()->parent());
-    EXPECT_EQ(frameView->scrollTranslation(), scrollerProperties->overflowClip()->localTransformSpace());
+    EXPECT_EQ(frameScrollTranslation(), scrollerProperties->scrollTranslation()->parent());
+    EXPECT_EQ(frameScrollTranslation(), scrollerProperties->overflowClip()->localTransformSpace());
     EXPECT_EQ(FloatRoundedRect(120, 340, 400, 300), scrollerProperties->overflowClip()->clipRect());
-    EXPECT_EQ(frameView->contentClip(), scrollerProperties->overflowClip()->parent());
-    CHECK_EXACT_VISUAL_RECT(scroller->layoutObject(), frameView->layoutView());
+    EXPECT_EQ(frameContentClip(), scrollerProperties->overflowClip()->parent());
+    // http://crbug.com/638415
+    if (!rootLayerScrolls()) {
+        CHECK_EXACT_VISUAL_RECT(scroller->layoutObject(), frameView->layoutView());
+    }
 
     // The relative-positioned element should have accumulated box offset (exclude scrolling),
     // and should be affected by ancestor scroll transforms.
     Element* relPos = document().getElementById("rel-pos");
     const ObjectPaintProperties* relPosProperties = relPos->layoutObject()->objectPaintProperties();
     EXPECT_EQ(TransformationMatrix().translate(680, 1120), relPosProperties->paintOffsetTranslation()->matrix());
     EXPECT_EQ(scrollerProperties->scrollTranslation(), relPosProperties->paintOffsetTranslation()->parent());
     EXPECT_EQ(relPosProperties->transform(), relPosProperties->overflowClip()->localTransformSpace());
     EXPECT_EQ(FloatRoundedRect(0, 0, 100, 200), relPosProperties->overflowClip()->clipRect());
     EXPECT_EQ(scrollerProperties->overflowClip(), relPosProperties->overflowClip()->parent());
     CHECK_EXACT_VISUAL_RECT(relPos->layoutObject(), frameView->layoutView());
 
     // The absolute-positioned element should not be affected by non-positioned scroller at all.
     Element* absPos = document().getElementById("abs-pos");
     const ObjectPaintProperties* absPosProperties = absPos->layoutObject()->objectPaintProperties();
     EXPECT_EQ(TransformationMatrix().translate(123, 456), absPosProperties->paintOffsetTranslation()->matrix());
-    EXPECT_EQ(frameView->scrollTranslation(), absPosProperties->paintOffsetTranslation()->parent());
+    EXPECT_EQ(frameScrollTranslation(), absPosProperties->paintOffsetTranslation()->parent());
     EXPECT_EQ(absPosProperties->transform(), absPosProperties->overflowClip()->localTransformSpace());
     EXPECT_EQ(FloatRoundedRect(0, 0, 300, 400), absPosProperties->overflowClip()->clipRect());
-    EXPECT_EQ(frameView->contentClip(), absPosProperties->overflowClip()->parent());
-    CHECK_EXACT_VISUAL_RECT(absPos->layoutObject(), frameView->layoutView());
+    EXPECT_EQ(frameContentClip(), absPosProperties->overflowClip()->parent());
+    // http://crbug.com/638415
+    if (!rootLayerScrolls()) {
+        CHECK_EXACT_VISUAL_RECT(absPos->layoutObject(), frameView->layoutView());
+    }
 }
 
-TEST_F(PaintPropertyTreeBuilderTest, FrameScrollingTraditional)
+TEST_P(PaintPropertyTreeBuilderTest, FrameScrollingTraditional)
 {
     setBodyInnerHTML("<style> body { height: 10000px; } </style>");
 
     document().domWindow()->scrollTo(0, 100);
 
     FrameView* frameView = document().view();
     frameView->updateAllLifecyclePhases();
-    EXPECT_EQ(TransformationMatrix(), frameView->preTranslation()->matrix());
-    EXPECT_EQ(frameView->rootTransform(), frameView->preTranslation()->parent());
-    EXPECT_EQ(nullptr, frameView->rootTransform()->parent());
-    EXPECT_EQ(TransformationMatrix().translate(0, -100), frameView->scrollTranslation()->matrix());
-    EXPECT_EQ(frameView->preTranslation(), frameView->scrollTranslation()->parent());
-    EXPECT_EQ(frameView->preTranslation(), frameView->contentClip()->localTransformSpace());
-    EXPECT_EQ(FloatRoundedRect(0, 0, 800, 600), frameView->contentClip()->clipRect());
-    EXPECT_EQ(frameView->rootClip(), frameView->contentClip()->parent());
-    EXPECT_EQ(nullptr, frameView->rootClip()->parent());
+    EXPECT_EQ(TransformationMatrix(), framePreTranslation()->matrix());
+    if (!rootLayerScrolls())
+        EXPECT_EQ(rootTransform(), framePreTranslation()->parent());
+    EXPECT_EQ(nullptr, rootTransform()->parent());
+    EXPECT_EQ(TransformationMatrix().translate(0, -100), frameScrollTranslation()->matrix());
+    EXPECT_EQ(framePreTranslation(), frameScrollTranslation()->parent());
+    EXPECT_EQ(framePreTranslation(), frameContentClip()->localTransformSpace());
+    EXPECT_EQ(FloatRoundedRect(0, 0, 800, 600), frameContentClip()->clipRect());
+    EXPECT_EQ(rootClip(), frameContentClip()->parent());
+    if (!rootLayerScrolls())
+        EXPECT_EQ(nullptr, rootClip()->parent());
 
     LayoutViewItem layoutViewItem = document().layoutViewItem();
     const ObjectPaintProperties* layoutViewProperties = layoutViewItem.objectPaintProperties();
-    EXPECT_EQ(nullptr, layoutViewProperties->scrollTranslation());
-    CHECK_EXACT_VISUAL_RECT(document().body()->layoutObject(), frameView->layoutView());
+    if (!rootLayerScrolls()) {
+        EXPECT_EQ(nullptr, layoutViewProperties->scrollTranslation());
+        // http://crbug.com/638415
+        CHECK_EXACT_VISUAL_RECT(document().body()->layoutObject(), frameView->layoutView());
+    }
 }
 
 // TODO(trchen): Settings::rootLayerScrolls cannot be switched after main frame being created.
 // Need to set it during test setup. Besides that, the test still won't work because
 // root layer scrolling mode is not compatible with SPv2 at this moment.
 // (Duplicate display item ID for FrameView and LayoutView.)
-TEST_F(PaintPropertyTreeBuilderTest, DISABLED_FrameScrollingRootLayerScrolls)
+TEST_P(PaintPropertyTreeBuilderTest, DISABLED_FrameScrollingRootLayerScrolls)

[pdr., 2016/08/17 04:30:41]

Can you remove DISABLED_ from this test? I think it needs some minor fixing but
nothing major.

[pdr., 2016/08/17 06:35:43]

Err, delete this.

 {
-    document().settings()->setRootLayerScrolls(true);
-
     setBodyInnerHTML("<style> body { height: 10000px; } </style>");
 
     document().domWindow()->scrollTo(0, 100);
 
     FrameView* frameView = document().view();
     frameView->updateAllLifecyclePhases();
-    EXPECT_EQ(TransformationMatrix(), frameView->preTranslation()->matrix());
-    EXPECT_EQ(nullptr, frameView->preTranslation()->parent());
-    EXPECT_EQ(TransformationMatrix(), frameView->scrollTranslation()->matrix());
-    EXPECT_EQ(frameView->preTranslation(), frameView->scrollTranslation()->parent());
+    EXPECT_EQ(TransformationMatrix(), framePreTranslation()->matrix());
+    EXPECT_EQ(nullptr, framePreTranslation()->parent());
+    EXPECT_EQ(TransformationMatrix(), frameScrollTranslation()->matrix());
+    EXPECT_EQ(framePreTranslation(), frameScrollTranslation()->parent());
 
     LayoutViewItem layoutViewItem = document().layoutViewItem();
     const ObjectPaintProperties* layoutViewProperties = layoutViewItem.objectPaintProperties();
     EXPECT_EQ(TransformationMatrix().translate(0, -100), layoutViewProperties->scrollTranslation()->matrix());
-    EXPECT_EQ(frameView->scrollTranslation(), layoutViewProperties->scrollTranslation()->parent());
+    EXPECT_EQ(frameScrollTranslation(), layoutViewProperties->scrollTranslation()->parent());
     CHECK_EXACT_VISUAL_RECT(document().body()->layoutObject(), frameView->layoutView());
 }
 
-TEST_F(PaintPropertyTreeBuilderTest, Perspective)
+TEST_P(PaintPropertyTreeBuilderTest, Perspective)
 {
     loadTestData("perspective.html");
 
     Element* perspective = document().getElementById("perspective");
     const ObjectPaintProperties* perspectiveProperties = perspective->layoutObject()->objectPaintProperties();
     EXPECT_EQ(TransformationMatrix().applyPerspective(100), perspectiveProperties->perspective()->matrix());
     // The perspective origin is the center of the border box plus accumulated paint offset.
     EXPECT_EQ(FloatPoint3D(250, 250, 0), perspectiveProperties->perspective()->origin());
-    EXPECT_EQ(document().view()->scrollTranslation(), perspectiveProperties->perspective()->parent());
+    EXPECT_EQ(frameScrollTranslation(), perspectiveProperties->perspective()->parent());
 
     // Adding perspective doesn't clear paint offset. The paint offset will be passed down to children.
     Element* inner = document().getElementById("inner");
     const ObjectPaintProperties* innerProperties = inner->layoutObject()->objectPaintProperties();
     EXPECT_EQ(TransformationMatrix().translate(50, 100), innerProperties->paintOffsetTranslation()->matrix());
     EXPECT_EQ(perspectiveProperties->perspective(), innerProperties->paintOffsetTranslation()->parent());
     CHECK_EXACT_VISUAL_RECT(inner->layoutObject(), document().view()->layoutView());
 }
 
-TEST_F(PaintPropertyTreeBuilderTest, Transform)
+TEST_P(PaintPropertyTreeBuilderTest, Transform)
 {
     loadTestData("transform.html");
 
     Element* transform = document().getElementById("transform");
     const ObjectPaintProperties* transformProperties = transform->layoutObject()->objectPaintProperties();
     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(document().view()->scrollTranslation(), transformProperties->paintOffsetTranslation()->parent());
-    CHECK_EXACT_VISUAL_RECT(transform->layoutObject(), document().view()->layoutView());
+    EXPECT_EQ(frameScrollTranslation(), transformProperties->paintOffsetTranslation()->parent());
+    // http://crbug.com/638415
+    if (!rootLayerScrolls()) {
+        CHECK_EXACT_VISUAL_RECT(transform->layoutObject(), document().view()->layoutView());
+    }
 }
 
-TEST_F(PaintPropertyTreeBuilderTest, RelativePositionInline)
+TEST_P(PaintPropertyTreeBuilderTest, RelativePositionInline)
 {
     loadTestData("relative-position-inline.html");
 
     Element* inlineBlock = document().getElementById("inline-block");
     const ObjectPaintProperties* inlineBlockProperties = inlineBlock->layoutObject()->objectPaintProperties();
     EXPECT_EQ(TransformationMatrix().translate(135, 490), inlineBlockProperties->paintOffsetTranslation()->matrix());
-    EXPECT_EQ(document().view()->scrollTranslation(), inlineBlockProperties->paintOffsetTranslation()->parent());
+    EXPECT_EQ(frameScrollTranslation(), inlineBlockProperties->paintOffsetTranslation()->parent());
     CHECK_EXACT_VISUAL_RECT(inlineBlock->layoutObject(), document().view()->layoutView());
 }
 
-TEST_F(PaintPropertyTreeBuilderTest, NestedOpacityEffect)
+TEST_P(PaintPropertyTreeBuilderTest, NestedOpacityEffect)
 {
     setBodyInnerHTML(
         "<div id='nodeWithoutOpacity' style='width: 100px; height: 200px'>"
         "  <div id='childWithOpacity' style='opacity: 0.5; width: 50px; height: 60px;'>"
         "    <div id='grandChildWithoutOpacity' style='width: 20px; height: 30px'>"
         "      <div id='greatGrandChildWithOpacity' style='opacity: 0.2; width: 10px; height: 15px'/>"
         "    </div>"
         "  </div>"
         "</div>");
 
@@ skipping 13 matching lines @@
     EXPECT_NE(nullptr, grandChildWithoutOpacity->objectPaintProperties());
     CHECK_EXACT_VISUAL_RECT(grandChildWithoutOpacity, document().view()->layoutView());
 
     LayoutObject* greatGrandChildWithOpacity = document().getElementById("greatGrandChildWithOpacity")->layoutObject();
     const ObjectPaintProperties* greatGrandChildWithOpacityProperties = greatGrandChildWithOpacity->objectPaintProperties();
     EXPECT_EQ(0.2f, greatGrandChildWithOpacityProperties->effect()->opacity());
     EXPECT_EQ(childWithOpacityProperties->effect(), greatGrandChildWithOpacityProperties->effect()->parent());
     CHECK_EXACT_VISUAL_RECT(greatGrandChildWithOpacity, document().view()->layoutView());
 }
 
-TEST_F(PaintPropertyTreeBuilderTest, TransformNodeDoesNotAffectEffectNodes)
+TEST_P(PaintPropertyTreeBuilderTest, TransformNodeDoesNotAffectEffectNodes)
 {
     setBodyInnerHTML(
         "<div id='nodeWithOpacity' style='opacity: 0.6' style='width: 100px; height: 200px'>"
         "  <div id='childWithTransform' style='transform: translate3d(10px, 10px, 0px); width: 50px; height: 60px;'>"
         "    <div id='grandChildWithOpacity' style='opacity: 0.4; width: 20px; height: 30px'/>"
         "  </div>"
         "</div>");
 
     LayoutObject* nodeWithOpacity = document().getElementById("nodeWithOpacity")->layoutObject();
     const ObjectPaintProperties* nodeWithOpacityProperties = nodeWithOpacity->objectPaintProperties();
     EXPECT_EQ(0.6f, nodeWithOpacityProperties->effect()->opacity());
     EXPECT_NE(nullptr, nodeWithOpacityProperties->effect()->parent());
     EXPECT_EQ(nullptr, nodeWithOpacityProperties->transform());
     CHECK_EXACT_VISUAL_RECT(nodeWithOpacity, document().view()->layoutView());
 
     LayoutObject* childWithTransform = document().getElementById("childWithTransform")->layoutObject();
     const ObjectPaintProperties* childWithTransformProperties = childWithTransform->objectPaintProperties();
     EXPECT_EQ(nullptr, childWithTransformProperties->effect());
     EXPECT_EQ(TransformationMatrix().translate(10, 10), childWithTransformProperties->transform()->matrix());
     CHECK_EXACT_VISUAL_RECT(childWithTransform, document().view()->layoutView());
 
     LayoutObject* grandChildWithOpacity = document().getElementById("grandChildWithOpacity")->layoutObject();
     const ObjectPaintProperties* grandChildWithOpacityProperties = grandChildWithOpacity->objectPaintProperties();
     EXPECT_EQ(0.4f, grandChildWithOpacityProperties->effect()->opacity());
     EXPECT_EQ(nodeWithOpacityProperties->effect(), grandChildWithOpacityProperties->effect()->parent());
     EXPECT_EQ(nullptr, grandChildWithOpacityProperties->transform());
     CHECK_EXACT_VISUAL_RECT(grandChildWithOpacity, document().view()->layoutView());
 }
 
-TEST_F(PaintPropertyTreeBuilderTest, EffectNodesAcrossStackingContext)
+TEST_P(PaintPropertyTreeBuilderTest, EffectNodesAcrossStackingContext)
 {
     setBodyInnerHTML(
         "<div id='nodeWithOpacity' style='opacity: 0.6; width: 100px; height: 200px'>"
         "  <div id='childWithStackingContext' style='position:absolute; width: 50px; height: 60px;'>"
         "    <div id='grandChildWithOpacity' style='opacity: 0.4; width: 20px; height: 30px'/>"
         "  </div>"
         "</div>");
 
     LayoutObject* nodeWithOpacity = document().getElementById("nodeWithOpacity")->layoutObject();
     const ObjectPaintProperties* nodeWithOpacityProperties = nodeWithOpacity->objectPaintProperties();
     EXPECT_EQ(0.6f, nodeWithOpacityProperties->effect()->opacity());
     EXPECT_NE(nullptr, nodeWithOpacityProperties->effect()->parent());
     EXPECT_EQ(nullptr, nodeWithOpacityProperties->transform());
     CHECK_EXACT_VISUAL_RECT(nodeWithOpacity, document().view()->layoutView());
 
     LayoutObject* childWithStackingContext = document().getElementById("childWithStackingContext")->layoutObject();
     const ObjectPaintProperties* childWithStackingContextProperties = childWithStackingContext->objectPaintProperties();
     EXPECT_EQ(nullptr, childWithStackingContextProperties->effect());
     EXPECT_EQ(nullptr, childWithStackingContextProperties->transform());
     CHECK_EXACT_VISUAL_RECT(childWithStackingContext, document().view()->layoutView());
 
     LayoutObject* grandChildWithOpacity = document().getElementById("grandChildWithOpacity")->layoutObject();
     const ObjectPaintProperties* grandChildWithOpacityProperties = grandChildWithOpacity->objectPaintProperties();
     EXPECT_EQ(0.4f, grandChildWithOpacityProperties->effect()->opacity());
     EXPECT_EQ(nodeWithOpacityProperties->effect(), grandChildWithOpacityProperties->effect()->parent());
     EXPECT_EQ(nullptr, grandChildWithOpacityProperties->transform());
     CHECK_EXACT_VISUAL_RECT(grandChildWithOpacity, document().view()->layoutView());
 }
 
-TEST_F(PaintPropertyTreeBuilderTest, EffectNodesInSVG)
+TEST_P(PaintPropertyTreeBuilderTest, EffectNodesInSVG)
 {
     setBodyInnerHTML(
         "<svg id='svgRoot'>"
         "  <g id='groupWithOpacity' opacity='0.6'>"
         "    <rect id='rectWithoutOpacity' />"
         "    <rect id='rectWithOpacity' opacity='0.4' />"
         "    <text id='textWithOpacity' opacity='0.2'>"
         "      <tspan id='tspanWithOpacity' opacity='0.1' />"
         "    </text>"
         "  </g>"
@@ skipping 19 matching lines @@
     EXPECT_EQ(0.2f, textWithOpacityProperties->effect()->opacity());
     EXPECT_EQ(groupWithOpacityProperties->effect(), textWithOpacityProperties->effect()->parent());
 
     // Ensure that opacity nodes are created for LayoutSVGTSpan which inherits from LayoutSVGInline instead of LayoutSVGModelObject.
     LayoutObject& tspanWithOpacity = *document().getElementById("tspanWithOpacity")->layoutObject();
     const ObjectPaintProperties* tspanWithOpacityProperties = tspanWithOpacity.objectPaintProperties();
     EXPECT_EQ(0.1f, tspanWithOpacityProperties->effect()->opacity());
     EXPECT_EQ(textWithOpacityProperties->effect(), tspanWithOpacityProperties->effect()->parent());
 }
 
-TEST_F(PaintPropertyTreeBuilderTest, EffectNodesAcrossHTMLSVGBoundary)
+TEST_P(PaintPropertyTreeBuilderTest, EffectNodesAcrossHTMLSVGBoundary)
 {
     setBodyInnerHTML(
         "<div id='divWithOpacity' style='opacity: 0.2;'>"
         "  <svg id='svgRootWithOpacity' style='opacity: 0.3;'>"
         "    <rect id='rectWithOpacity' opacity='0.4' />"
         "  </svg>"
         "</div>");
 
     LayoutObject& divWithOpacity = *document().getElementById("divWithOpacity")->layoutObject();
     const ObjectPaintProperties* divWithOpacityProperties = divWithOpacity.objectPaintProperties();
     EXPECT_EQ(0.2f, divWithOpacityProperties->effect()->opacity());
     EXPECT_NE(nullptr, divWithOpacityProperties->effect()->parent());
 
     LayoutObject& svgRootWithOpacity = *document().getElementById("svgRootWithOpacity")->layoutObject();
     const ObjectPaintProperties* svgRootWithOpacityProperties = svgRootWithOpacity.objectPaintProperties();
     EXPECT_EQ(0.3f, svgRootWithOpacityProperties->effect()->opacity());
     EXPECT_EQ(divWithOpacityProperties->effect(), svgRootWithOpacityProperties->effect()->parent());
 
     LayoutObject& rectWithOpacity = *document().getElementById("rectWithOpacity")->layoutObject();
     const ObjectPaintProperties* rectWithOpacityProperties = rectWithOpacity.objectPaintProperties();
     EXPECT_EQ(0.4f, rectWithOpacityProperties->effect()->opacity());
     EXPECT_EQ(svgRootWithOpacityProperties->effect(), rectWithOpacityProperties->effect()->parent());
 }
 
-TEST_F(PaintPropertyTreeBuilderTest, EffectNodesAcrossSVGHTMLBoundary)
+TEST_P(PaintPropertyTreeBuilderTest, EffectNodesAcrossSVGHTMLBoundary)
 {
     setBodyInnerHTML(
         "<svg id='svgRootWithOpacity' style='opacity: 0.3;'>"
         "  <foreignObject id='foreignObjectWithOpacity' opacity='0.4'>"
         "    <body>"
         "      <span id='spanWithOpacity' style='opacity: 0.5'/>"
         "    </body>"
         "  </foreignObject>"
         "</svg>");
 
     LayoutObject& svgRootWithOpacity = *document().getElementById("svgRootWithOpacity")->layoutObject();
     const ObjectPaintProperties* svgRootWithOpacityProperties = svgRootWithOpacity.objectPaintProperties();
     EXPECT_EQ(0.3f, svgRootWithOpacityProperties->effect()->opacity());
     EXPECT_NE(nullptr, svgRootWithOpacityProperties->effect()->parent());
 
     LayoutObject& foreignObjectWithOpacity = *document().getElementById("foreignObjectWithOpacity")->layoutObject();
     const ObjectPaintProperties* foreignObjectWithOpacityProperties = foreignObjectWithOpacity.objectPaintProperties();
     EXPECT_EQ(0.4f, foreignObjectWithOpacityProperties->effect()->opacity());
     EXPECT_EQ(svgRootWithOpacityProperties->effect(), foreignObjectWithOpacityProperties->effect()->parent());
 
     LayoutObject& spanWithOpacity = *document().getElementById("spanWithOpacity")->layoutObject();
     const ObjectPaintProperties* spanWithOpacityProperties = spanWithOpacity.objectPaintProperties();
     EXPECT_EQ(0.5f, spanWithOpacityProperties->effect()->opacity());
     EXPECT_EQ(foreignObjectWithOpacityProperties->effect(), spanWithOpacityProperties->effect()->parent());
 }
 
-TEST_F(PaintPropertyTreeBuilderTest, TransformNodesInSVG)
+TEST_P(PaintPropertyTreeBuilderTest, TransformNodesInSVG)
 {
     setBodyInnerHTML(
         "<style>"
         "  body {"
         "    margin: 0px;"
         "  }"
         "  svg {"
         "    margin-left: 50px;"
         "    transform: translate3d(1px, 2px, 3px);"
         "    position: absolute;"
         "    left: 20px;"
         "    top: 25px;"
         "  }"
         "  rect {"
         "    transform: translate(100px, 100px) rotate(45deg);"
         "    transform-origin: 50px 25px;"
         "  }"
         "</style>"
         "<svg id='svgRootWith3dTransform' width='100px' height='100px'>"
         "  <rect id='rectWith2dTransform' width='100px' height='100px' />"
         "</svg>");
 
     LayoutObject& svgRootWith3dTransform = *document().getElementById("svgRootWith3dTransform")->layoutObject();
     const ObjectPaintProperties* svgRootWith3dTransformProperties = svgRootWith3dTransform.objectPaintProperties();
     EXPECT_EQ(TransformationMatrix().translate3d(1, 2, 3), svgRootWith3dTransformProperties->transform()->matrix());
     EXPECT_EQ(FloatPoint3D(50, 50, 0), svgRootWith3dTransformProperties->transform()->origin());
     EXPECT_EQ(svgRootWith3dTransformProperties->paintOffsetTranslation(), svgRootWith3dTransformProperties->transform()->parent());
     EXPECT_EQ(TransformationMatrix().translate(70, 25), svgRootWith3dTransformProperties->paintOffsetTranslation()->matrix());
-    EXPECT_EQ(document().view()->scrollTranslation(), svgRootWith3dTransformProperties->paintOffsetTranslation()->parent());
+    EXPECT_EQ(frameScrollTranslation(), svgRootWith3dTransformProperties->paintOffsetTranslation()->parent());
 
     LayoutObject& rectWith2dTransform = *document().getElementById("rectWith2dTransform")->layoutObject();
     const ObjectPaintProperties* rectWith2dTransformProperties = rectWith2dTransform.objectPaintProperties();
     TransformationMatrix matrix;
     matrix.translate(100, 100);
     matrix.rotate(45);
     // SVG's transform origin is baked into the transform.
     matrix.applyTransformOrigin(50, 25, 0);
     EXPECT_EQ(matrix, rectWith2dTransformProperties->transform()->matrix());
     EXPECT_EQ(FloatPoint3D(0, 0, 0), rectWith2dTransformProperties->transform()->origin());
     // SVG does not use paint offset.
     EXPECT_EQ(nullptr, rectWith2dTransformProperties->paintOffsetTranslation());
 }
 
-TEST_F(PaintPropertyTreeBuilderTest, SVGViewBoxTransform)
+TEST_P(PaintPropertyTreeBuilderTest, SVGViewBoxTransform)
 {
     setBodyInnerHTML(
         "<style>"
         "  body {"
         "    margin: 0px;"
         "  }"
         "  svg {"
         "    transform: translate3d(1px, 2px, 3px);"
         "    position: absolute;"
         "  }"
@@ skipping 10 matching lines @@
     EXPECT_EQ(TransformationMatrix().translate3d(1, 2, 3), svgWithViewBoxProperties->transform()->matrix());
     EXPECT_EQ(TransformationMatrix().translate(-50, -50), svgWithViewBoxProperties->svgLocalToBorderBoxTransform()->matrix());
     EXPECT_EQ(svgWithViewBoxProperties->svgLocalToBorderBoxTransform()->parent(), svgWithViewBoxProperties->transform());
 
     LayoutObject& rect = *document().getElementById("rect")->layoutObject();
     const ObjectPaintProperties* rectProperties = rect.objectPaintProperties();
     EXPECT_EQ(TransformationMatrix().translate(100, 100), rectProperties->transform()->matrix());
     EXPECT_EQ(svgWithViewBoxProperties->svgLocalToBorderBoxTransform(), rectProperties->transform()->parent());
 }
 
-TEST_F(PaintPropertyTreeBuilderTest, SVGRootPaintOffsetTransformNode)
+TEST_P(PaintPropertyTreeBuilderTest, SVGRootPaintOffsetTransformNode)
 {
     setBodyInnerHTML(
         "<style>body { margin: 0px; } </style>"
         "<svg id='svg' style='margin-left: 50px; margin-top: 25px; width: 100px; height: 100px;' />");
 
     LayoutObject& svg = *document().getElementById("svg")->layoutObject();
     const ObjectPaintProperties* svgProperties = svg.objectPaintProperties();
     // Ensure that a paint offset transform is not unnecessarily emitted.
     EXPECT_EQ(nullptr, svgProperties->paintOffsetTranslation());
     EXPECT_EQ(TransformationMatrix().translate(50, 25), svgProperties->svgLocalToBorderBoxTransform()->matrix());
-    EXPECT_EQ(document().view()->scrollTranslation(), svgProperties->svgLocalToBorderBoxTransform()->parent());
+    EXPECT_EQ(frameScrollTranslation(), svgProperties->svgLocalToBorderBoxTransform()->parent());
 }
 
-TEST_F(PaintPropertyTreeBuilderTest, SVGRootLocalToBorderBoxTransformNode)
+TEST_P(PaintPropertyTreeBuilderTest, SVGRootLocalToBorderBoxTransformNode)
 {
     setBodyInnerHTML(
         "<style>"
         "  body { margin: 0px; }"
         "  svg { margin-left: 2px; margin-top: 3px; transform: translate(5px, 7px); border: 11px solid green; }"
         "</style>"
         "<svg id='svg' width='100px' height='100px' viewBox='0 0 13 13'>"
         "  <rect id='rect' transform='translate(17 19)' />"
         "</svg>");
 
     LayoutObject& svg = *document().getElementById("svg")->layoutObject();
     const ObjectPaintProperties* svgProperties = svg.objectPaintProperties();
     EXPECT_EQ(TransformationMatrix().translate(2, 3), svgProperties->paintOffsetTranslation()->matrix());
     EXPECT_EQ(TransformationMatrix().translate(5, 7), svgProperties->transform()->matrix());
     EXPECT_EQ(TransformationMatrix().translate(11, 11).scale(100.0 / 13.0), svgProperties->svgLocalToBorderBoxTransform()->matrix());
     EXPECT_EQ(svgProperties->paintOffsetTranslation(), svgProperties->transform()->parent());
     EXPECT_EQ(svgProperties->transform(), svgProperties->svgLocalToBorderBoxTransform()->parent());
 
     // Ensure the rect's transform is a child of the local to border box transform.
     LayoutObject& rect = *document().getElementById("rect")->layoutObject();
     const ObjectPaintProperties* rectProperties = rect.objectPaintProperties();
     EXPECT_EQ(TransformationMatrix().translate(17, 19), rectProperties->transform()->matrix());
     EXPECT_EQ(svgProperties->svgLocalToBorderBoxTransform(), rectProperties->transform()->parent());
 }
 
-TEST_F(PaintPropertyTreeBuilderTest, SVGNestedViewboxTransforms)
+TEST_P(PaintPropertyTreeBuilderTest, SVGNestedViewboxTransforms)
 {
     setBodyInnerHTML(
         "<style>body { margin: 0px; } </style>"
         "<svg id='svg' width='100px' height='100px' viewBox='0 0 50 50' style='transform: translate(11px, 11px);'>"
         "  <svg id='nestedSvg' width='50px' height='50px' viewBox='0 0 5 5'>"
         "    <rect id='rect' transform='translate(13 13)' />"
         "  </svg>"
         "</svg>");
 
     LayoutObject& svg = *document().getElementById("svg")->layoutObject();
     const ObjectPaintProperties* svgProperties = svg.objectPaintProperties();
     EXPECT_EQ(TransformationMatrix().translate(11, 11), svgProperties->transform()->matrix());
     EXPECT_EQ(TransformationMatrix().scale(2), svgProperties->svgLocalToBorderBoxTransform()->matrix());
 
     LayoutObject& nestedSvg = *document().getElementById("nestedSvg")->layoutObject();
     const ObjectPaintProperties* nestedSvgProperties = nestedSvg.objectPaintProperties();
     EXPECT_EQ(TransformationMatrix().scale(10), nestedSvgProperties->transform()->matrix());
     EXPECT_EQ(nullptr, nestedSvgProperties->svgLocalToBorderBoxTransform());
     EXPECT_EQ(svgProperties->svgLocalToBorderBoxTransform(), nestedSvgProperties->transform()->parent());
 
     LayoutObject& rect = *document().getElementById("rect")->layoutObject();
     const ObjectPaintProperties* rectProperties = rect.objectPaintProperties();
     EXPECT_EQ(TransformationMatrix().translate(13, 13), rectProperties->transform()->matrix());
     EXPECT_EQ(nestedSvgProperties->transform(), rectProperties->transform()->parent());
 }
 
-TEST_F(PaintPropertyTreeBuilderTest, TransformNodesAcrossSVGHTMLBoundary)
+TEST_P(PaintPropertyTreeBuilderTest, TransformNodesAcrossSVGHTMLBoundary)
 {
     setBodyInnerHTML(
         "<style> body { margin: 0px; } </style>"
         "<svg id='svgWithTransform' style='transform: translate3d(1px, 2px, 3px);'>"
         "  <foreignObject>"
         "    <body>"
         "      <div id='divWithTransform' style='transform: translate3d(3px, 4px, 5px);'></div>"
         "    </body>"
         "  </foreignObject>"
         "</svg>");
 
     LayoutObject& svgWithTransform = *document().getElementById("svgWithTransform")->layoutObject();
     const ObjectPaintProperties* svgWithTransformProperties = svgWithTransform.objectPaintProperties();
     EXPECT_EQ(TransformationMatrix().translate3d(1, 2, 3), svgWithTransformProperties->transform()->matrix());
 
     LayoutObject& divWithTransform = *document().getElementById("divWithTransform")->layoutObject();
     const ObjectPaintProperties* divWithTransformProperties = divWithTransform.objectPaintProperties();
     EXPECT_EQ(TransformationMatrix().translate3d(3, 4, 5), divWithTransformProperties->transform()->matrix());
     // Ensure the div's transform node is a child of the svg's transform node.
     EXPECT_EQ(svgWithTransformProperties->transform(), divWithTransformProperties->transform()->parent());
 }
 
-TEST_F(PaintPropertyTreeBuilderTest, FixedTransformAncestorAcrossSVGHTMLBoundary)
+TEST_P(PaintPropertyTreeBuilderTest, FixedTransformAncestorAcrossSVGHTMLBoundary)
 {
     setBodyInnerHTML(
         "<style> body { margin: 0px; } </style>"
         "<svg id='svg' style='transform: translate3d(1px, 2px, 3px);'>"
         "  <g id='container' transform='translate(20 30)'>"
         "    <foreignObject>"
         "      <body>"
         "        <div id='fixed' style='position: fixed; left: 200px; top: 150px;'></div>"
         "      </body>"
         "    </foreignObject>"
         "  </g>"
         "</svg>");
 
     LayoutObject& svg = *document().getElementById("svg")->layoutObject();
     const ObjectPaintProperties* svgProperties = svg.objectPaintProperties();
     EXPECT_EQ(TransformationMatrix().translate3d(1, 2, 3), svgProperties->transform()->matrix());
 
     LayoutObject& container = *document().getElementById("container")->layoutObject();
     const ObjectPaintProperties* containerProperties = container.objectPaintProperties();
     EXPECT_EQ(TransformationMatrix().translate(20, 30), containerProperties->transform()->matrix());
     EXPECT_EQ(svgProperties->transform(), containerProperties->transform()->parent());
 
     Element* fixed = document().getElementById("fixed");
     const ObjectPaintProperties* fixedProperties = fixed->layoutObject()->objectPaintProperties();
     EXPECT_EQ(TransformationMatrix().translate(200, 150), fixedProperties->paintOffsetTranslation()->matrix());
     // Ensure the fixed position element is rooted at the nearest transform container.
     EXPECT_EQ(containerProperties->transform(), fixedProperties->paintOffsetTranslation()->parent());
 }
 
-TEST_F(PaintPropertyTreeBuilderTest, ControlClip)
+TEST_P(PaintPropertyTreeBuilderTest, ControlClip)
 {
     setBodyInnerHTML(
         "<style>"
         "  body {"
         "    margin: 0;"
         "  }"
         "  input {"
         "    border-width: 5px;"
         "    padding: 0;"
         "  }"
         "</style>"
         "<input id='button' type='button' style='width:345px; height:123px' value='some text'/>");
 
-    FrameView* frameView = document().view();
-    LayoutObject* button = document().getElementById("button")->layoutObject();
-    const ObjectPaintProperties* buttonProperties = button->objectPaintProperties();
-    EXPECT_EQ(frameView->scrollTranslation(), buttonProperties->overflowClip()->localTransformSpace());
+    LayoutObject& button = *document().getElementById("button")->layoutObject();
+    const ObjectPaintProperties* buttonProperties = button.objectPaintProperties();
+    EXPECT_EQ(frameScrollTranslation(), buttonProperties->overflowClip()->localTransformSpace());
     EXPECT_EQ(FloatRoundedRect(5, 5, 335, 113), buttonProperties->overflowClip()->clipRect());
-    EXPECT_EQ(frameView->contentClip(), buttonProperties->overflowClip()->parent());
-    CHECK_EXACT_VISUAL_RECT(button, frameView->layoutView());
+    EXPECT_EQ(frameContentClip(), buttonProperties->overflowClip()->parent());
+    CHECK_EXACT_VISUAL_RECT((&button), document().view()->layoutView());
 }
 
-TEST_F(PaintPropertyTreeBuilderTest, BorderRadiusClip)
+TEST_P(PaintPropertyTreeBuilderTest, BorderRadiusClip)
 {
     setBodyInnerHTML(
         "<style>"
         " body {"
         "   margin: 0px;"
         " }"
         " #div {"
         "   border-radius: 12px 34px 56px 78px;"
         "   border-top: 45px solid;"
         "   border-right: 50px solid;"
         "   border-bottom: 55px solid;"
         "   border-left: 60px solid;"
         "   width: 500px;"
         "   height: 400px;"
         "   overflow: scroll;"
         " }"
         "</style>"
         "<div id='div'></div>");
 
-    FrameView* frameView = document().view();
-    LayoutObject* div = document().getElementById("div")->layoutObject();
-    const ObjectPaintProperties* divProperties = div->objectPaintProperties();
-    EXPECT_EQ(frameView->scrollTranslation(), divProperties->overflowClip()->localTransformSpace());
+    LayoutObject& div = *document().getElementById("div")->layoutObject();
+    const ObjectPaintProperties* divProperties = div.objectPaintProperties();
+    EXPECT_EQ(frameScrollTranslation(), divProperties->overflowClip()->localTransformSpace());
     // The overflow clip rect includes only the padding box.
     // padding box = border box(500+60+50, 400+45+55) - border outset(60+50, 45+55) - scrollbars(15, 15)
     EXPECT_EQ(FloatRoundedRect(60, 45, 500, 400), divProperties->overflowClip()->clipRect());
     const ClipPaintPropertyNode* borderRadiusClip = divProperties->overflowClip()->parent();
-    EXPECT_EQ(frameView->scrollTranslation(), borderRadiusClip->localTransformSpace());
+    EXPECT_EQ(frameScrollTranslation(), borderRadiusClip->localTransformSpace());
     // The border radius clip is the area enclosed by inner border edge, including the scrollbars.
     // As the border-radius is specified in outer radius, the inner radius is calculated by:
     // inner radius = max(outer radius - border width, 0)
     // In the case that two adjacent borders have different width, the inner radius of the corner
     // may transition from one value to the other. i.e. being an ellipse.
     EXPECT_EQ(
         FloatRoundedRect(
             FloatRect(60, 45, 500, 400), // = border box(610, 500) - border outset(110, 100)
             FloatSize(0, 0), //   (top left)     = max((12, 12) - (60, 45), (0, 0))
             FloatSize(0, 0), //   (top right)    = max((34, 34) - (50, 45), (0, 0))
             FloatSize(18, 23), // (bottom left)  = max((78, 78) - (60, 55), (0, 0))
             FloatSize(6, 1)), //  (bottom right) = max((56, 56) - (50, 55), (0, 0))
         borderRadiusClip->clipRect());
-    EXPECT_EQ(frameView->contentClip(), borderRadiusClip->parent());
-    CHECK_EXACT_VISUAL_RECT(div, frameView->layoutView());
+    EXPECT_EQ(frameContentClip(), borderRadiusClip->parent());
+    CHECK_EXACT_VISUAL_RECT((&div), document().view()->layoutView());
 }
 
-TEST_F(PaintPropertyTreeBuilderTest, TransformNodesAcrossSubframes)
+TEST_P(PaintPropertyTreeBuilderTest, TransformNodesAcrossSubframes)
 {
     setBodyInnerHTML(
         "<style>body { margin: 0; }</style>"
         "<div id='divWithTransform' style='transform: translate3d(1px, 2px, 3px);'>"
-        "  <iframe id='frame'></iframe>"
+        "  <iframe style='border: 7px solid black' id='frame'></iframe>"
         "</div>");
     Document& frameDocument = setupChildIframe("frame",
         "<style>body { margin: 0; }</style><div id='transform' style='transform: translate3d(4px, 5px, 6px); width: 100px; height: 200px'></div>");
     FrameView* frameView = document().view();
     frameView->updateAllLifecyclePhases();
 
     LayoutObject* divWithTransform = document().getElementById("divWithTransform")->layoutObject();
     const ObjectPaintProperties* divWithTransformProperties = divWithTransform->objectPaintProperties();
     EXPECT_EQ(TransformationMatrix().translate3d(1, 2, 3), divWithTransformProperties->transform()->matrix());
-    CHECK_EXACT_VISUAL_RECT(divWithTransform, frameView->layoutView());
+    // http://crbug.com/638415
+    if (!rootLayerScrolls()) {
+        CHECK_EXACT_VISUAL_RECT(divWithTransform, frameView->layoutView());
+    }
 
     LayoutObject* innerDivWithTransform = frameDocument.getElementById("transform")->layoutObject();
     const ObjectPaintProperties* innerDivWithTransformProperties = innerDivWithTransform->objectPaintProperties();
     auto* innerDivTransform = innerDivWithTransformProperties->transform();
     EXPECT_EQ(TransformationMatrix().translate3d(4, 5, 6), innerDivTransform->matrix());
     CHECK_EXACT_VISUAL_RECT(innerDivWithTransform, frameView->layoutView());
 
     // Ensure that the inner div's transform is correctly rooted in the root frame's transform tree.
     // This asserts that we have the following tree structure:
     // ...
     //   Transform transform=translation=1.000000,2.000000,3.000000
-    //     PreTranslation transform=translation=2.000000,2.000000,0.000000
+    //     PreTranslation transform=translation=7.000000,7.000000,0.000000
     //       ScrollTranslation transform=translation=0.000000,0.000000,0.000000
     //         Transform transform=translation=4.000000,5.000000,6.000000
     auto* innerDocumentScrollTranslation = innerDivTransform->parent();
     EXPECT_EQ(TransformationMatrix().translate3d(0, 0, 0), innerDocumentScrollTranslation->matrix());
     auto* iframePreTranslation = innerDocumentScrollTranslation->parent();
-    EXPECT_EQ(TransformationMatrix().translate3d(2, 2, 0), iframePreTranslation->matrix());
+    EXPECT_EQ(TransformationMatrix().translate3d(7, 7, 0), iframePreTranslation->matrix());
     EXPECT_EQ(divWithTransformProperties->transform(), iframePreTranslation->parent());
 }
 
-TEST_F(PaintPropertyTreeBuilderTest, TransformNodesInTransformedSubframes)
+TEST_P(PaintPropertyTreeBuilderTest, TransformNodesInTransformedSubframes)
 {
     setBodyInnerHTML(
         "<style>body { margin: 0; }</style>"
         "<div id='divWithTransform' style='transform: translate3d(1px, 2px, 3px);'>"
         "  <iframe id='frame' style='transform: translate3d(4px, 5px, 6px); border: 42px solid; margin: 7px;'></iframe>"
         "</div>");
     Document& frameDocument = setupChildIframe("frame",
         "<style>body { margin: 31px; }</style><div id='transform' style='transform: translate3d(7px, 8px, 9px); width: 100px; height: 200px'></div>");
     FrameView* frameView = document().view();
     frameView->updateAllLifecyclePhases();
@@ skipping 21 matching lines @@
     EXPECT_EQ(TransformationMatrix().translate3d(42, 42, 0), iframePreTranslation->matrix());
     auto* iframeTransform = iframePreTranslation->parent();
     EXPECT_EQ(TransformationMatrix().translate3d(4, 5, 6), iframeTransform->matrix());
     auto* iframePaintOffsetTranslation = iframeTransform->parent();
     EXPECT_EQ(TransformationMatrix().translate3d(7, 7, 0), iframePaintOffsetTranslation->matrix());
     auto* divWithTransformTransform = iframePaintOffsetTranslation->parent();
     EXPECT_EQ(TransformationMatrix().translate3d(1, 2, 3), divWithTransformTransform->matrix());
 
     LayoutObject* divWithTransform = document().getElementById("divWithTransform")->layoutObject();
     EXPECT_EQ(divWithTransformTransform, divWithTransform->objectPaintProperties()->transform());
-    CHECK_EXACT_VISUAL_RECT(divWithTransform, frameView->layoutView());
+    // http://crbug.com/638415
+    if (!rootLayerScrolls()) {
+        CHECK_EXACT_VISUAL_RECT(divWithTransform, frameView->layoutView());
+    }
 }
 
-TEST_F(PaintPropertyTreeBuilderTest, TreeContextClipByNonStackingContext)
+TEST_P(PaintPropertyTreeBuilderTest, TreeContextClipByNonStackingContext)
 {
     // This test verifies the tree builder correctly computes and records the property tree context
     // for a (pseudo) stacking context that is scrolled by a containing block that is not one of
     // the painting ancestors.
     setBodyInnerHTML(
         "<style>body { margin: 0; }</style>"
         "<div id='scroller' style='overflow:scroll; width:400px; height:300px;'>"
         "  <div id='child' style='position:relative; width:100px; height: 200px;'></div>"
         "  <div style='height:10000px;'></div>"
         "</div>"
     );
     FrameView* frameView = document().view();
 
     LayoutObject* scroller = document().getElementById("scroller")->layoutObject();
     const ObjectPaintProperties* scrollerProperties = scroller->objectPaintProperties();
     LayoutObject* child = document().getElementById("child")->layoutObject();
     const ObjectPaintProperties* childProperties = child->objectPaintProperties();
 
     EXPECT_EQ(scrollerProperties->overflowClip(), childProperties->localBorderBoxProperties()->propertyTreeState.clip);
     EXPECT_EQ(scrollerProperties->scrollTranslation(), childProperties->localBorderBoxProperties()->propertyTreeState.transform);
     EXPECT_NE(nullptr, childProperties->localBorderBoxProperties()->propertyTreeState.effect);
     CHECK_EXACT_VISUAL_RECT(scroller, frameView->layoutView());
     CHECK_EXACT_VISUAL_RECT(child, frameView->layoutView());
 }
 
-TEST_F(PaintPropertyTreeBuilderTest, TreeContextUnclipFromParentStackingContext)
+TEST_P(PaintPropertyTreeBuilderTest, TreeContextUnclipFromParentStackingContext)
 {
     // This test verifies the tree builder correctly computes and records the property tree context
     // for a (pseudo) stacking context that has a scrolling painting ancestor that is not its
     // containing block (thus should not be scrolled by it).
 
     setBodyInnerHTML(
         "<style>body { margin: 0; }</style>"
         "<div id='scroller' style='overflow:scroll; opacity:0.5;'>"
         "  <div id='child' style='position:absolute; left:0; top:0; width: 100px; height: 200px'></div>"
         "  <div style='height:10000px;'></div>"
         "</div>"
     );
 
-    FrameView* frameView = document().view();
-    LayoutObject* scroller = document().getElementById("scroller")->layoutObject();
-    const ObjectPaintProperties* scrollerProperties = scroller->objectPaintProperties();
-    LayoutObject* child = document().getElementById("child")->layoutObject();
-    const ObjectPaintProperties* childProperties = child->objectPaintProperties();
+    LayoutObject& scroller = *document().getElementById("scroller")->layoutObject();
+    const ObjectPaintProperties* scrollerProperties = scroller.objectPaintProperties();
+    LayoutObject& child = *document().getElementById("child")->layoutObject();
+    const ObjectPaintProperties* childProperties = child.objectPaintProperties();
 
-    EXPECT_EQ(frameView->contentClip(), childProperties->localBorderBoxProperties()->propertyTreeState.clip);
-    EXPECT_EQ(frameView->scrollTranslation(), childProperties->localBorderBoxProperties()->propertyTreeState.transform);
+    EXPECT_EQ(frameContentClip(), childProperties->localBorderBoxProperties()->propertyTreeState.clip);
+    EXPECT_EQ(frameScrollTranslation(), childProperties->localBorderBoxProperties()->propertyTreeState.transform);
     EXPECT_EQ(scrollerProperties->effect(), childProperties->localBorderBoxProperties()->propertyTreeState.effect);
-    CHECK_EXACT_VISUAL_RECT(scroller, frameView->layoutView());
-    CHECK_EXACT_VISUAL_RECT(child, frameView->layoutView());
+    if (!rootLayerScrolls()) {
+        CHECK_EXACT_VISUAL_RECT((&scroller), document().view()->layoutView());
+    }
+    CHECK_EXACT_VISUAL_RECT((&child), document().view()->layoutView());
 }
 
-TEST_F(PaintPropertyTreeBuilderTest, TableCellLayoutLocation)
+TEST_P(PaintPropertyTreeBuilderTest, TableCellLayoutLocation)
 {
     // This test verifies that the border box space of a table cell is being correctly computed.
     // Table cells have weird location adjustment in our layout/paint implementation.
     setBodyInnerHTML(
         "<style>"
         "  body {"
         "    margin: 0;"
         "  }"
         "  table {"
         "    border-spacing: 0;"
@@ skipping 11 matching lines @@
         "    width: 100px;"
         "    height: 100px;"
         "  }"
         "</style>"
         "<table>"
         "  <tr><td></td><td></td></tr>"
         "  <tr><td></td><td><div id='target'></div></td></tr>"
         "</table>"
     );
 
-    FrameView* frameView = document().view();
-    LayoutObject* target = document().getElementById("target")->layoutObject();
-    const ObjectPaintProperties* targetProperties = target->objectPaintProperties();
+    LayoutObject& target = *document().getElementById("target")->layoutObject();
+    const ObjectPaintProperties* targetProperties = target.objectPaintProperties();
 
     EXPECT_EQ(LayoutPoint(170, 170), targetProperties->localBorderBoxProperties()->paintOffset);
-    EXPECT_EQ(frameView->scrollTranslation(), targetProperties->localBorderBoxProperties()->propertyTreeState.transform);
-    CHECK_EXACT_VISUAL_RECT(target, frameView->layoutView());
+    EXPECT_EQ(frameScrollTranslation(), targetProperties->localBorderBoxProperties()->propertyTreeState.transform);
+    CHECK_EXACT_VISUAL_RECT((&target), document().view()->layoutView());
 }
 
-TEST_F(PaintPropertyTreeBuilderTest, CSSClipFixedPositionDescendant)
+TEST_P(PaintPropertyTreeBuilderTest, CSSClipFixedPositionDescendant)
 {
     // This test verifies that clip tree hierarchy being generated correctly for the hard case
     // such that a fixed position element getting clipped by an absolute position CSS clip.
     setBodyInnerHTML(
         "<style>"
         "  #clip {"
         "    position: absolute;"
         "    left: 123px;"
         "    top: 456px;"
         "    clip: rect(10px, 80px, 70px, 40px);"
         "    width: 100px;"
         "    height: 100px;"
         "  }"
         "  #fixed {"
         "    position: fixed;"
         "    left: 654px;"
         "    top: 321px;"
         "    width: 10px;"
         "    height: 20px"
         "  }"
         "</style>"
         "<div id='clip'><div id='fixed'></div></div>"
     );
     LayoutRect localClipRect(40, 10, 40, 60);
     LayoutRect absoluteClipRect = localClipRect;
     absoluteClipRect.move(123, 456);
 
-    FrameView* frameView = document().view();
-
-    LayoutObject* clip = document().getElementById("clip")->layoutObject();
-    const ObjectPaintProperties* clipProperties = clip->objectPaintProperties();
-    EXPECT_EQ(frameView->contentClip(), clipProperties->cssClip()->parent());
-    EXPECT_EQ(frameView->scrollTranslation(), clipProperties->cssClip()->localTransformSpace());
+    LayoutObject& clip = *document().getElementById("clip")->layoutObject();
+    const ObjectPaintProperties* clipProperties = clip.objectPaintProperties();
+    EXPECT_EQ(frameContentClip(), clipProperties->cssClip()->parent());
+    EXPECT_EQ(frameScrollTranslation(), clipProperties->cssClip()->localTransformSpace());
     EXPECT_EQ(FloatRoundedRect(FloatRect(absoluteClipRect)), clipProperties->cssClip()->clipRect());
 // TODO(chrishtr): the old visual rect code is not able to apply CSS clip to fixed-position elements.
 //    CHECK_EXACT_VISUAL_RECT(clip, frameView->layoutView());
 
     LayoutObject* fixed = document().getElementById("fixed")->layoutObject();
     const ObjectPaintProperties* fixedProperties = fixed->objectPaintProperties();
     EXPECT_EQ(clipProperties->cssClip(), fixedProperties->localBorderBoxProperties()->propertyTreeState.clip);
-    EXPECT_EQ(frameView->preTranslation(), fixedProperties->localBorderBoxProperties()->propertyTreeState.transform->parent());
+    EXPECT_EQ(framePreTranslation(), fixedProperties->localBorderBoxProperties()->propertyTreeState.transform->parent());
     EXPECT_EQ(TransformationMatrix().translate(654, 321), fixedProperties->localBorderBoxProperties()->propertyTreeState.transform->matrix());
     EXPECT_EQ(LayoutPoint(), fixedProperties->localBorderBoxProperties()->paintOffset);
-    CHECK_EXACT_VISUAL_RECT(fixed, frameView->layoutView());
+    // http://crbug.com/638386
+    if (!rootLayerScrolls()) {
+        CHECK_EXACT_VISUAL_RECT(fixed, document().view()->layoutView());
+    }
 }
 
-TEST_F(PaintPropertyTreeBuilderTest, CSSClipAbsPositionDescendant)
+TEST_P(PaintPropertyTreeBuilderTest, CSSClipAbsPositionDescendant)
 {
     // This test verifies that clip tree hierarchy being generated correctly for the hard case
     // such that a fixed position element getting clipped by an absolute position CSS clip.
     setBodyInnerHTML(
         "<style>"
         "  #clip {"
         "    position: absolute;"
         "    left: 123px;"
         "    top: 456px;"
         "    clip: rect(10px, 80px, 70px, 40px);"
@@ skipping 11 matching lines @@
         "<div id='clip'><div id='absolute'></div></div>"
     );
     LayoutRect localClipRect(40, 10, 40, 60);
     LayoutRect absoluteClipRect = localClipRect;
     absoluteClipRect.move(123, 456);
 
     FrameView* frameView = document().view();
 
     LayoutObject* clip = document().getElementById("clip")->layoutObject();
     const ObjectPaintProperties* clipProperties = clip->objectPaintProperties();
-    EXPECT_EQ(frameView->contentClip(), clipProperties->cssClip()->parent());
-    EXPECT_EQ(frameView->scrollTranslation(), clipProperties->cssClip()->localTransformSpace());
+    EXPECT_EQ(frameContentClip(), clipProperties->cssClip()->parent());
+    EXPECT_EQ(frameScrollTranslation(), clipProperties->cssClip()->localTransformSpace());
     EXPECT_EQ(FloatRoundedRect(FloatRect(absoluteClipRect)), clipProperties->cssClip()->clipRect());
 // TODO(chrishtr): the old visual rect code is not able to apply CSS clip to fixed-position elements.
 //    CHECK_VISUAL_RECT(clip, frameView->layoutView());
 
     LayoutObject* absolute = document().getElementById("absolute")->layoutObject();
     const ObjectPaintProperties* absPosProperties = absolute->objectPaintProperties();
     EXPECT_EQ(clipProperties->cssClip(), absPosProperties->localBorderBoxProperties()->propertyTreeState.clip);
-    EXPECT_EQ(frameView->preTranslation(), absPosProperties->localBorderBoxProperties()->propertyTreeState.transform->parent());
+    EXPECT_EQ(framePreTranslation(), absPosProperties->localBorderBoxProperties()->propertyTreeState.transform->parent());
     EXPECT_EQ(LayoutPoint(123, 456), absPosProperties->localBorderBoxProperties()->paintOffset);
-    CHECK_EXACT_VISUAL_RECT(absolute, frameView->layoutView());
+    // http://crbug.com/638386
+    if (!rootLayerScrolls()) {
+        CHECK_EXACT_VISUAL_RECT(absolute, frameView->layoutView());
+    }
 }
 
-TEST_F(PaintPropertyTreeBuilderTest, CSSClipFixedPositionDescendantNonShared)
+TEST_P(PaintPropertyTreeBuilderTest, CSSClipFixedPositionDescendantNonShared)
 {
     // This test is similar to CSSClipFixedPositionDescendant above, except that
     // now we have a parent overflow clip that should be escaped by the fixed descendant.
     setBodyInnerHTML(
         "<style>"
         "  body {"
         "    margin: 0;"
         "  }"
         "  #overflow {"
         "    position: relative;"
@@ skipping 14 matching lines @@
         "    left: 654px;"
         "    top: 321px;"
         "  }"
         "</style>"
         "<div id='overflow'><div id='clip'><div id='fixed'></div></div></div>"
     );
     LayoutRect localClipRect(40, 10, 40, 60);
     LayoutRect absoluteClipRect = localClipRect;
     absoluteClipRect.move(123, 456);
 
-    FrameView* frameView = document().view();
-
-    LayoutObject* overflow = document().getElementById("overflow")->layoutObject();
-    const ObjectPaintProperties* overflowProperties = overflow->objectPaintProperties();
-    EXPECT_EQ(frameView->contentClip(), overflowProperties->overflowClip()->parent());
-    EXPECT_EQ(frameView->scrollTranslation(), overflowProperties->scrollTranslation()->parent());
-    CHECK_EXACT_VISUAL_RECT(overflow, frameView->layoutView());
+    LayoutObject& overflow = *document().getElementById("overflow")->layoutObject();
+    const ObjectPaintProperties* overflowProperties = overflow.objectPaintProperties();
+    EXPECT_EQ(frameContentClip(), overflowProperties->overflowClip()->parent());
+    EXPECT_EQ(frameScrollTranslation(), overflowProperties->scrollTranslation()->parent());
+    CHECK_EXACT_VISUAL_RECT((&overflow), document().view()->layoutView());
 
     LayoutObject* clip = document().getElementById("clip")->layoutObject();
     const ObjectPaintProperties* clipProperties = clip->objectPaintProperties();
     EXPECT_EQ(overflowProperties->overflowClip(), clipProperties->cssClip()->parent());
     EXPECT_EQ(overflowProperties->scrollTranslation(), clipProperties->cssClip()->localTransformSpace());
     EXPECT_EQ(FloatRoundedRect(FloatRect(absoluteClipRect)), clipProperties->cssClip()->clipRect());
-    EXPECT_EQ(frameView->contentClip(), clipProperties->cssClipFixedPosition()->parent());
+    EXPECT_EQ(frameContentClip(), clipProperties->cssClipFixedPosition()->parent());
     EXPECT_EQ(overflowProperties->scrollTranslation(), clipProperties->cssClipFixedPosition()->localTransformSpace());
     EXPECT_EQ(FloatRoundedRect(FloatRect(absoluteClipRect)), clipProperties->cssClipFixedPosition()->clipRect());
-    CHECK_EXACT_VISUAL_RECT(clip, frameView->layoutView());
+    CHECK_EXACT_VISUAL_RECT(clip, document().view()->layoutView());
 
     LayoutObject* fixed = document().getElementById("fixed")->layoutObject();
     const ObjectPaintProperties* fixedProperties = fixed->objectPaintProperties();
     EXPECT_EQ(clipProperties->cssClipFixedPosition(), fixedProperties->localBorderBoxProperties()->propertyTreeState.clip);
-    EXPECT_EQ(frameView->preTranslation(), fixedProperties->localBorderBoxProperties()->propertyTreeState.transform->parent());
+    EXPECT_EQ(framePreTranslation(), fixedProperties->localBorderBoxProperties()->propertyTreeState.transform->parent());
     EXPECT_EQ(TransformationMatrix().translate(654, 321), fixedProperties->localBorderBoxProperties()->propertyTreeState.transform->matrix());
     EXPECT_EQ(LayoutPoint(), fixedProperties->localBorderBoxProperties()->paintOffset);
-    CHECK_EXACT_VISUAL_RECT(fixed, frameView->layoutView());
+    // http://crbug.com/638386
+    if (!rootLayerScrolls()) {
+        CHECK_EXACT_VISUAL_RECT(fixed, document().view()->layoutView());
+    }
 }
 
-TEST_F(PaintPropertyTreeBuilderTest, ColumnSpannerUnderRelativePositioned)
+TEST_P(PaintPropertyTreeBuilderTest, ColumnSpannerUnderRelativePositioned)
 {
     setBodyInnerHTML(
         "<div style='columns: 3; position: absolute; top: 44px; left: 55px;'>"
         "  <div style='position: relative; top: 100px; left: 100px'>"
         "    <div id='spanner' style='column-span: all; opacity: 0.5; width: 100px; height: 100px;'></div>"
         "  </div>"
         "</div>"
     );
 
     LayoutObject* spanner = getLayoutObjectByElementId("spanner");
     EXPECT_EQ(LayoutPoint(55, 44), spanner->objectPaintProperties()->localBorderBoxProperties()->paintOffset);
     CHECK_EXACT_VISUAL_RECT(spanner, document().view()->layoutView());
 }
 
-TEST_F(PaintPropertyTreeBuilderTest, FractionalPaintOffset)
+TEST_P(PaintPropertyTreeBuilderTest, FractionalPaintOffset)
 {
     setBodyInnerHTML(
         "<style>"
         "  * { margin: 0; }"
         "  div { position: absolute; }"
         "</style>"
         "<div id='a' style='width: 70px; height: 70px; left: 0.1px; top: 0.3px;'>"
         "  <div id='b' style='width: 40px; height: 40px; left: 0.5px; top: 11.1px;'></div>"
         "</div>"
     );
     FrameView* frameView = document().view();
 
     LayoutObject* a = document().getElementById("a")->layoutObject();
     const ObjectPaintProperties* aProperties = a->objectPaintProperties();
     LayoutPoint aPaintOffset = LayoutPoint(FloatPoint(0.1, 0.3));
     EXPECT_EQ(aPaintOffset, aProperties->localBorderBoxProperties()->paintOffset);
     CHECK_EXACT_VISUAL_RECT(a, frameView->layoutView());
 
     LayoutObject* b = document().getElementById("b")->layoutObject();
     const ObjectPaintProperties* bProperties = b->objectPaintProperties();
     LayoutPoint bPaintOffset = aPaintOffset + LayoutPoint(FloatPoint(0.5, 11.1));
     EXPECT_EQ(bPaintOffset, bProperties->localBorderBoxProperties()->paintOffset);
     CHECK_EXACT_VISUAL_RECT(a, frameView->layoutView());
 }
 
-TEST_F(PaintPropertyTreeBuilderTest, PaintOffsetWithBasicPixelSnapping)
+TEST_P(PaintPropertyTreeBuilderTest, PaintOffsetWithBasicPixelSnapping)
 {
     setBodyInnerHTML(
         "<style>"
         "  * { margin: 0; }"
         "  div { position: relative; }"
         "</style>"
         "<div id='a' style='width: 70px; height: 70px; left: 0.3px; top: 0.3px;'>"
         "  <div id='b' style='width: 40px; height: 40px; transform: translateZ(0);'>"
         "    <div id='c' style='width: 40px; height: 40px; left: 0.1px; top: 0.1px;'></div>"
         "  </div>"
@@ skipping 15 matching lines @@
     LayoutObject* c = document().getElementById("c")->layoutObject();
     LayoutPoint cPaintOffset = subpixelAccumulation + LayoutPoint(FloatPoint(0.1, 0.1));
     const ObjectPaintProperties* cProperties = c->objectPaintProperties();
     EXPECT_EQ(cPaintOffset, cProperties->localBorderBoxProperties()->paintOffset);
     // Visual rects via the non-paint properties system use enclosingIntRect before applying transforms,
     // because they are computed bottom-up and therefore can't apply pixel snapping. Therefore apply a
     // slop of 1px.
     CHECK_VISUAL_RECT(c, frameView->layoutView(), 1);
 }
 
-TEST_F(PaintPropertyTreeBuilderTest, PaintOffsetWithPixelSnappingThroughTransform)
+TEST_P(PaintPropertyTreeBuilderTest, PaintOffsetWithPixelSnappingThroughTransform)
 {
     setBodyInnerHTML(
         "<style>"
         "  * { margin: 0; }"
         "  div { position: relative; }"
         "</style>"
         "<div id='a' style='width: 70px; height: 70px; left: 0.7px; top: 0.7px;'>"
         "  <div id='b' style='width: 40px; height: 40px; transform: translateZ(0);'>"
         "    <div id='c' style='width: 40px; height: 40px; left: 0.7px; top: 0.7px;'></div>"
         "  </div>"
@@ skipping 15 matching lines @@
     LayoutObject* c = document().getElementById("c")->layoutObject();
     LayoutPoint cPaintOffset = subpixelAccumulation + LayoutPoint(FloatPoint(0.7, 0.7));
     const ObjectPaintProperties* cProperties = c->objectPaintProperties();
     EXPECT_EQ(cPaintOffset, cProperties->localBorderBoxProperties()->paintOffset);
     // Visual rects via the non-paint properties system use enclosingIntRect before applying transforms,
     // because they are computed bottom-up and therefore can't apply pixel snapping. Therefore apply a
     // slop of 1px.
     CHECK_VISUAL_RECT(c, frameView->layoutView(), 1);
 }
 
-TEST_F(PaintPropertyTreeBuilderTest, PaintOffsetWithPixelSnappingThroughMultipleTransforms)
+TEST_P(PaintPropertyTreeBuilderTest, PaintOffsetWithPixelSnappingThroughMultipleTransforms)
 {
     setBodyInnerHTML(
         "<style>"
         "  * { margin: 0; }"
         "  div { position: relative; }"
         "</style>"
         "<div id='a' style='width: 70px; height: 70px; left: 0.7px; top: 0.7px;'>"
         "  <div id='b' style='width: 40px; height: 40px; transform: translate3d(5px, 7px, 0);'>"
         "    <div id='c' style='width: 40px; height: 40px; transform: translate3d(11px, 13px, 0);'>"
         "      <div id='d' style='width: 40px; height: 40px; left: 0.7px; top: 0.7px;'></div>"
@@ skipping 27 matching lines @@
     LayoutObject* d = document().getElementById("d")->layoutObject();
     LayoutPoint dPaintOffset = subpixelAccumulation + LayoutPoint(FloatPoint(0.7, 0.7));
     const ObjectPaintProperties* dProperties = d->objectPaintProperties();
     EXPECT_EQ(dPaintOffset, dProperties->localBorderBoxProperties()->paintOffset);
     // Visual rects via the non-paint properties system use enclosingIntRect before applying transforms,
     // because they are computed bottom-up and therefore can't apply pixel snapping. Therefore apply a
     // slop of 1px.
     CHECK_VISUAL_RECT(d, frameView->layoutView(), 1);
 }
 
-TEST_F(PaintPropertyTreeBuilderTest, PaintOffsetWithPixelSnappingWithFixedPos)
+TEST_P(PaintPropertyTreeBuilderTest, PaintOffsetWithPixelSnappingWithFixedPos)
 {
     setBodyInnerHTML(
         "<style>"
         "  * { margin: 0; }"
         "</style>"
         "<div id='a' style='width: 70px; height: 70px; left: 0.7px; position: relative;'>"
         "  <div id='b' style='width: 40px; height: 40px; transform: translateZ(0); position: relative;'>"
         "    <div id='fixed' style='width: 40px; height: 40px; position: fixed;'>"
         "      <div id='d' style='width: 40px; height: 40px; left: 0.7px; position: relative;'></div>"
         "    </div>"
@@ skipping 22 matching lines @@
     LayoutObject* d = document().getElementById("d")->layoutObject();
     LayoutPoint dPaintOffset = subpixelAccumulation + LayoutPoint(FloatPoint(0.7, 0));
     const ObjectPaintProperties* dProperties = d->objectPaintProperties();
     EXPECT_EQ(dPaintOffset, dProperties->localBorderBoxProperties()->paintOffset);
     // Visual rects via the non-paint properties system use enclosingIntRect before applying transforms,
     // because they are computed bottom-up and therefore can't apply pixel snapping. Therefore apply a
     // slop of 1px.
     CHECK_VISUAL_RECT(d, frameView->layoutView(), 1);
 }
 
-TEST_F(PaintPropertyTreeBuilderTest, SvgPixelSnappingShouldResetPaintOffset)
+TEST_P(PaintPropertyTreeBuilderTest, SvgPixelSnappingShouldResetPaintOffset)
 {
     setBodyInnerHTML(
         "<svg id='svg' style='position: relative; left: 0.1px; transform: matrix(1, 0, 0, 1, 0, 0);'>"
         "    <rect id='rect' transform='translate(1, 1)'/>"
         "</svg>");
 
     LayoutObject& svgWithTransform = *document().getElementById("svg")->layoutObject();
     const ObjectPaintProperties* svgWithTransformProperties = svgWithTransform.objectPaintProperties();
     EXPECT_EQ(TransformationMatrix(), svgWithTransformProperties->transform()->matrix());
     EXPECT_EQ(LayoutPoint(FloatPoint(0.1, 0)), svgWithTransformProperties->localBorderBoxProperties()->paintOffset);
     EXPECT_EQ(nullptr, svgWithTransformProperties->svgLocalToBorderBoxTransform());
 
     LayoutObject& rectWithTransform = *document().getElementById("rect")->layoutObject();
     const ObjectPaintProperties* rectWithTransformProperties = rectWithTransform.objectPaintProperties();
     EXPECT_EQ(TransformationMatrix().translate(1, 1), rectWithTransformProperties->transform()->matrix());
 
     // Ensure there is no PaintOffset transform between the rect and the svg's transform.
     EXPECT_EQ(svgWithTransformProperties->transform(), rectWithTransformProperties->transform()->parent());
 }
 
-TEST_F(PaintPropertyTreeBuilderTest, NoRenderingContextByDefault)
+TEST_P(PaintPropertyTreeBuilderTest, NoRenderingContextByDefault)
 {
     setBodyInnerHTML("<div style='transform: translateZ(0)'></div>");
 
     const ObjectPaintProperties* properties = document().body()->firstChild()->layoutObject()->objectPaintProperties();
     ASSERT_TRUE(properties->transform());
     EXPECT_FALSE(properties->transform()->hasRenderingContext());
 }
 
-TEST_F(PaintPropertyTreeBuilderTest, Preserve3DCreatesSharedRenderingContext)
+TEST_P(PaintPropertyTreeBuilderTest, Preserve3DCreatesSharedRenderingContext)
 {
     setBodyInnerHTML(
         "<div style='transform-style: preserve-3d'>"
         "  <div id='a' style='transform: translateZ(0); width: 30px; height: 40px'></div>"
         "  <div id='b' style='transform: translateZ(0); width: 20px; height: 10px'></div>"
         "</div>");
     FrameView* frameView = document().view();
 
     LayoutObject* a = document().getElementById("a")->layoutObject();
     const ObjectPaintProperties* aProperties = a->objectPaintProperties();
     LayoutObject* b = document().getElementById("b")->layoutObject();
     const ObjectPaintProperties* bProperties = b->objectPaintProperties();
     ASSERT_TRUE(aProperties->transform() && bProperties->transform());
     EXPECT_NE(aProperties->transform(), bProperties->transform());
     EXPECT_TRUE(aProperties->transform()->hasRenderingContext());
     EXPECT_TRUE(bProperties->transform()->hasRenderingContext());
     EXPECT_EQ(aProperties->transform()->renderingContextID(), bProperties->transform()->renderingContextID());
     CHECK_EXACT_VISUAL_RECT(a, frameView->layoutView());
     CHECK_EXACT_VISUAL_RECT(b, frameView->layoutView());
 }
 
-TEST_F(PaintPropertyTreeBuilderTest, FlatTransformStyleEndsRenderingContext)
+TEST_P(PaintPropertyTreeBuilderTest, FlatTransformStyleEndsRenderingContext)
 {
     setBodyInnerHTML(
         "<div style='transform-style: preserve-3d'>"
         "  <div id='a' style='transform: translateZ(0); width: 30px; height: 40px'>"
         "    <div id='b' style='transform: translateZ(0); width: 10px; height: 20px'></div>"
         "  </div>"
         "</div>");
     FrameView* frameView = document().view();
 
     LayoutObject* a = document().getElementById("a")->layoutObject();
     const ObjectPaintProperties* aProperties = a->objectPaintProperties();
     LayoutObject* b = document().getElementById("b")->layoutObject();
     const ObjectPaintProperties* bProperties = b->objectPaintProperties();
     ASSERT_FALSE(a->styleRef().preserves3D());
 
     ASSERT_TRUE(aProperties->transform() && bProperties->transform());
 
     // #a should participate in a rendering context (due to its parent), but its
     // child #b should not.
     EXPECT_TRUE(aProperties->transform()->hasRenderingContext());
     EXPECT_FALSE(bProperties->transform()->hasRenderingContext());
     CHECK_EXACT_VISUAL_RECT(a, frameView->layoutView());
     CHECK_EXACT_VISUAL_RECT(b, frameView->layoutView());
 }
 
-TEST_F(PaintPropertyTreeBuilderTest, NestedRenderingContexts)
+TEST_P(PaintPropertyTreeBuilderTest, NestedRenderingContexts)
 {
     setBodyInnerHTML(
         "<div style='transform-style: preserve-3d'>"
         "  <div id='a' style='transform: translateZ(0); width: 50px; height: 60px'>"
         "    <div style='transform-style: preserve-3d; width: 30px; height: 40px'>"
         "      <div id='b' style='transform: translateZ(0); width: 10px; height: 20px'>"
         "    </div>"
         "  </div>"
         "</div>");
     FrameView* frameView = document().view();
@@ skipping 32 matching lines @@
 static bool someNodeFlattensTransform(const TransformPaintPropertyNode* node, const TransformPaintPropertyNode* ancestor)
 {
     while (node != ancestor) {
         if (node->flattensInheritedTransform())
             return true;
         node = node->parent();
     }
     return false;
 }
 
-TEST_F(PaintPropertyTreeBuilderTest, FlatTransformStylePropagatesToChildren)
+TEST_P(PaintPropertyTreeBuilderTest, FlatTransformStylePropagatesToChildren)
 {
     setBodyInnerHTML(
         "<div id='a' style='transform: translateZ(0); transform-style: flat; width: 30px; height: 40px'>"
         "  <div id='b' style='transform: translateZ(0); width: 10px; height: 10px'></div>"
         "</div>");
     FrameView* frameView = document().view();
 
     LayoutObject* a = document().getElementById("a")->layoutObject();
     LayoutObject* b = document().getElementById("b")->layoutObject();
     const auto* aTransform = a->objectPaintProperties()->transform();
     ASSERT_TRUE(aTransform);
     const auto* bTransform = b->objectPaintProperties()->transform();
     ASSERT_TRUE(bTransform);
     ASSERT_TRUE(nodeHasAncestor(bTransform, aTransform));
 
     // Some node must flatten the inherited transform from #a before it reaches
     // #b's transform.
     EXPECT_TRUE(someNodeFlattensTransform(bTransform, aTransform));
     CHECK_EXACT_VISUAL_RECT(a, frameView->layoutView());
     CHECK_EXACT_VISUAL_RECT(b, frameView->layoutView());
 }
 
-TEST_F(PaintPropertyTreeBuilderTest, Preserve3DTransformStylePropagatesToChildren)
+TEST_P(PaintPropertyTreeBuilderTest, Preserve3DTransformStylePropagatesToChildren)
 {
     setBodyInnerHTML(
         "<div id='a' style='transform: translateZ(0); transform-style: preserve-3d; width: 30px; height: 40px'>"
         "  <div id='b' style='transform: translateZ(0); width: 10px; height: 10px'></div>"
         "</div>");
     FrameView* frameView = document().view();
 
     LayoutObject* a = document().getElementById("a")->layoutObject();
     LayoutObject* b = document().getElementById("b")->layoutObject();
     const auto* aTransform = a->objectPaintProperties()->transform();
     ASSERT_TRUE(aTransform);
     const auto* bTransform = b->objectPaintProperties()->transform();
     ASSERT_TRUE(bTransform);
     ASSERT_TRUE(nodeHasAncestor(bTransform, aTransform));
 
     // No node may flatten the inherited transform from #a before it reaches
     // #b's transform.
     EXPECT_FALSE(someNodeFlattensTransform(bTransform, aTransform));
     CHECK_EXACT_VISUAL_RECT(a, frameView->layoutView());
     CHECK_EXACT_VISUAL_RECT(b, frameView->layoutView());
 }
 
-TEST_F(PaintPropertyTreeBuilderTest, PerspectiveIsNotFlattened)
+TEST_P(PaintPropertyTreeBuilderTest, PerspectiveIsNotFlattened)
 {
     // It's necessary to make nodes from the one that applies perspective to
     // ones that combine with it preserve 3D. Otherwise, the perspective doesn't
     // do anything.
     setBodyInnerHTML(
         "<div id='a' style='perspective: 800px; width: 30px; height: 40px'>"
         "  <div id='b' style='transform: translateZ(0); width: 10px; height: 20px'></div>"
         "</div>");
     FrameView* frameView = document().view();
 
     LayoutObject* a = document().getElementById("a")->layoutObject();
     LayoutObject* b = document().getElementById("b")->layoutObject();
     const ObjectPaintProperties* aProperties = a->objectPaintProperties();
     const ObjectPaintProperties* bProperties = b->objectPaintProperties();
     const TransformPaintPropertyNode* aPerspective = aProperties->perspective();
     ASSERT_TRUE(aPerspective);
     const TransformPaintPropertyNode* bTransform = bProperties->transform();
     ASSERT_TRUE(bTransform);
     ASSERT_TRUE(nodeHasAncestor(bTransform, aPerspective));
     EXPECT_FALSE(someNodeFlattensTransform(bTransform, aPerspective));
     CHECK_EXACT_VISUAL_RECT(a, frameView->layoutView());
     CHECK_EXACT_VISUAL_RECT(b, frameView->layoutView());
 }
 
-TEST_F(PaintPropertyTreeBuilderTest, PerspectiveDoesNotEstablishRenderingContext)
+TEST_P(PaintPropertyTreeBuilderTest, PerspectiveDoesNotEstablishRenderingContext)
 {
     // It's necessary to make nodes from the one that applies perspective to
     // ones that combine with it preserve 3D. Otherwise, the perspective doesn't
     // do anything.
     setBodyInnerHTML(
         "<div id='a' style='perspective: 800px; width: 30px; height: 40px'>"
         "  <div id='b' style='transform: translateZ(0); width: 10px; height: 20px'></div>"
         "</div>");
     FrameView* frameView = document().view();
 
     LayoutObject* a = document().getElementById("a")->layoutObject();
     LayoutObject* b = document().getElementById("b")->layoutObject();
     const ObjectPaintProperties* aProperties = a->objectPaintProperties();
     const ObjectPaintProperties* bProperties = b->objectPaintProperties();
     const TransformPaintPropertyNode* aPerspective = aProperties->perspective();
     ASSERT_TRUE(aPerspective);
     EXPECT_FALSE(aPerspective->hasRenderingContext());
     const TransformPaintPropertyNode* bTransform = bProperties->transform();
     ASSERT_TRUE(bTransform);
     EXPECT_FALSE(bTransform->hasRenderingContext());
     CHECK_EXACT_VISUAL_RECT(a, frameView->layoutView());
     CHECK_EXACT_VISUAL_RECT(b, frameView->layoutView());
 }
 
-TEST_F(PaintPropertyTreeBuilderTest, CachedProperties)
+TEST_P(PaintPropertyTreeBuilderTest, CachedProperties)
 {
     setBodyInnerHTML(
         "<div id='a' style='transform: translate(33px, 44px); width: 50px; height: 60px'>"
         "  <div id='b' style='transform: translate(55px, 66px); width: 30px; height: 40px'>"
         "    <div id='c' style='transform: translate(77px, 88px); width: 10px; height: 20px'>C<div>"
         "  </div>"
         "</div>");
     FrameView* frameView = document().view();
 
     Element* a = document().getElementById("a");
@@ skipping 71 matching lines @@
     EXPECT_EQ(cProperties, c->layoutObject()->objectPaintProperties());
     EXPECT_EQ(cTransformNode, cProperties->transform());
     EXPECT_EQ(bTransformNode, cTransformNode->parent());
 
     CHECK_EXACT_VISUAL_RECT(a->layoutObject(), frameView->layoutView());
     CHECK_EXACT_VISUAL_RECT(b->layoutObject(), frameView->layoutView());
     CHECK_EXACT_VISUAL_RECT(c->layoutObject(), frameView->layoutView());
 }
 
 } // namespace blink