Incrementally build main thread scrolling reasons [spv2]

third_party/WebKit/Source/platform/graphics/compositing/PaintArtifactCompositorTest.cpp

 // Copyright 2016 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 "platform/graphics/compositing/PaintArtifactCompositor.h"
 
 #include "base/test/test_simple_task_runner.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "cc/layers/layer.h"
 #include "cc/test/fake_compositor_frame_sink.h"
@@ skipping 611 matching lines @@
   EXPECT_EQ(convertedEffect3.id, contentLayerAt(2)->effect_tree_index());
 }
 
 TEST_F(PaintArtifactCompositorTestWithPropertyTrees, OneScrollNode) {
   RefPtr<TransformPaintPropertyNode> scrollTranslation =
       TransformPaintPropertyNode::create(TransformPaintPropertyNode::root(),
                                          TransformationMatrix().translate(7, 9),
                                          FloatPoint3D());
   RefPtr<ScrollPaintPropertyNode> scroll = ScrollPaintPropertyNode::create(
       ScrollPaintPropertyNode::root(), scrollTranslation, IntSize(11, 13),
-      IntSize(27, 31), true, false);
+      IntSize(27, 31), true, false, false, false);
 
   TestPaintArtifact artifact;
   artifact
       .chunk(scrollTranslation, ClipPaintPropertyNode::root(),
              EffectPaintPropertyNode::root(), scroll)
       .rectDrawing(FloatRect(11, 13, 17, 19), Color::white);
   update(artifact.build());
 
   const cc::ScrollTree& scrollTree = propertyTrees().scroll_tree;
   // Node #0 reserved for null; #1 for root render surface.
@@ skipping 21 matching lines @@
   RefPtr<EffectPaintPropertyNode> effect = EffectPaintPropertyNode::create(
       EffectPaintPropertyNode::root(), TransformPaintPropertyNode::root(),
       ClipPaintPropertyNode::root(), CompositorFilterOperations(), 0.5);
 
   RefPtr<TransformPaintPropertyNode> scrollTranslationA =
       TransformPaintPropertyNode::create(
           TransformPaintPropertyNode::root(),
           TransformationMatrix().translate(11, 13), FloatPoint3D());
   RefPtr<ScrollPaintPropertyNode> scrollA = ScrollPaintPropertyNode::create(
       ScrollPaintPropertyNode::root(), scrollTranslationA, IntSize(2, 3),
-      IntSize(5, 7), false, true);
-  scrollA->addMainThreadScrollingReasons(
-      MainThreadScrollingReason::kHasBackgroundAttachmentFixedObjects);
+      IntSize(5, 7), false, true, false, true);
   RefPtr<TransformPaintPropertyNode> scrollTranslationB =
       TransformPaintPropertyNode::create(
           scrollTranslationA, TransformationMatrix().translate(37, 41),
           FloatPoint3D());
   RefPtr<ScrollPaintPropertyNode> scrollB = ScrollPaintPropertyNode::create(
       scrollA, scrollTranslationB, IntSize(19, 23), IntSize(29, 31), true,
-      false);
+      false, false, false);
   TestPaintArtifact artifact;
   artifact
       .chunk(scrollTranslationA, ClipPaintPropertyNode::root(), effect, scrollA)
       .rectDrawing(FloatRect(7, 11, 13, 17), Color::white);
   artifact
       .chunk(scrollTranslationB, ClipPaintPropertyNode::root(), effect, scrollB)
       .rectDrawing(FloatRect(1, 2, 3, 5), Color::white);
   update(artifact.build());
 
   const cc::ScrollTree& scrollTree = propertyTrees().scroll_tree;
@@ skipping 26 matching lines @@
             scrollTree.current_scroll_offset(contentLayerAt(1)->id()));
 
   EXPECT_TRUE(scrollNodeA.main_thread_scrolling_reasons &
               MainThreadScrollingReason::kHasBackgroundAttachmentFixedObjects);
   EXPECT_FALSE(scrollNodeB.main_thread_scrolling_reasons &
                MainThreadScrollingReason::kHasBackgroundAttachmentFixedObjects);
 }
 
 }  // namespace
 }  // namespace blink