Rewrite Layer::SetScrollOffset{FromImplSide} property tree fast-path

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

Index: third_party/WebKit/Source/platform/graphics/compositing/PaintArtifactCompositorTest.cpp
diff --git a/third_party/WebKit/Source/platform/graphics/compositing/PaintArtifactCompositorTest.cpp b/third_party/WebKit/Source/platform/graphics/compositing/PaintArtifactCompositorTest.cpp
index 614331c0a4794824d789d3080aa40ef23e9e8aa7..e1d590ff449f588a4c841221b6d1a74bdc712be8 100644
--- a/third_party/WebKit/Source/platform/graphics/compositing/PaintArtifactCompositorTest.cpp
+++ b/third_party/WebKit/Source/platform/graphics/compositing/PaintArtifactCompositorTest.cpp
@@ -770,6 +770,9 @@ TEST_F(PaintArtifactCompositorTestWithPropertyTrees, OneScrollNode) {
   EXPECT_EQ(transform_node_index, transform_node.id);
 
   EXPECT_EQ(0u, scroll_client.did_scroll_count);
+  // TODO(pdr): The PaintArtifactCompositor should set the scroll clip layer id
+  // so the Layer is scrollable. This call should be removed.
+  layer->SetScrollClipLayerId(layer->id());
   layer->SetScrollOffsetFromImplSide(gfx::ScrollOffset(1, 2));
   EXPECT_EQ(1u, scroll_client.did_scroll_count);
   EXPECT_EQ(gfx::ScrollOffset(1, 2), scroll_client.last_scroll_offset);