Move scroll event handlers from layer to layer tree view.

cc/test/layer_tree_json_parser_unittest.cc

Index: cc/test/layer_tree_json_parser_unittest.cc
diff --git a/cc/test/layer_tree_json_parser_unittest.cc b/cc/test/layer_tree_json_parser_unittest.cc
index bb3e114375fb3a6064b7032a5838ee3a77aeeb69..7fcacc2849eb68fe07109f858ef11fd0549f6114 100644
--- a/cc/test/layer_tree_json_parser_unittest.cc
+++ b/cc/test/layer_tree_json_parser_unittest.cc
@@ -42,9 +42,6 @@ bool LayerTreesMatch(LayerImpl* const layer_impl,
   RETURN_IF_EXPECTATION_FAILS(EXPECT_FLOAT_EQ(layer_impl->opacity(),
                                               layer->opacity()));
   RETURN_IF_EXPECTATION_FAILS(
-      EXPECT_EQ(layer_impl->have_scroll_event_handlers(),
-                layer->have_scroll_event_handlers()));
-  RETURN_IF_EXPECTATION_FAILS(
       EXPECT_EQ(layer_impl->touch_event_handler_region(),
                 layer->touch_event_handler_region()));
 
@@ -80,8 +77,6 @@ TEST_F(LayerTreeJsonParserSanityCheck, Basic) {
 
   parent->SetPosition(gfx::PointF(25.f, 25.f));
 
-  child->SetHaveScrollEventHandlers(true);
-
   parent->AddChild(std::move(child));
   root_impl->AddChild(std::move(parent));
   tree->SetRootLayer(std::move(root_impl));