End-to-end prototype of compositor scrolling with slimming paint v2

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 101 matching lines @@
         ->property_trees()
         ->element_id_to_scroll_node_index[elementId];
   }
 
   const cc::TransformNode& transformNode(const cc::Layer* layer) {
     return *propertyTrees().transform_tree.Node(layer->transform_tree_index());
   }
 
   void update(const PaintArtifact& artifact) {
     GeometryMapper geometryMapper;
-    m_paintArtifactCompositor->update(artifact, nullptr, false, geometryMapper);
+    PaintArtifactCompositor::ScrollClientMap scrollClients;
+    m_paintArtifactCompositor->update(artifact, nullptr, false, geometryMapper,
+                                      scrollClients);
     m_webLayerTreeView->layerTreeHost()->LayoutAndUpdateLayers();
   }
 
   cc::Layer* rootLayer() { return m_paintArtifactCompositor->rootLayer(); }
 
   size_t contentLayerCount() {
     return m_paintArtifactCompositor->getExtraDataForTesting()
         ->contentLayers.size();
   }
 
@@ skipping 1549 matching lines @@
   artifact
       .chunk(TransformPaintPropertyNode::root(), ClipPaintPropertyNode::root(),
              effect.get())
       .rectDrawing(FloatRect(100, 100, 200, 100), Color::black);
   update(artifact.build());
 
   EXPECT_EQ(2, elementIdToEffectNodeIndex(expectedCompositorElementId));
 }
 
 }  // namespace blink