[not for review - epic CL] Adding Elastic+Momentum+Layered scrolling to views::ScrollView

cc/trees/layer_tree_host_common_unittest.cc

 // Copyright 2011 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 "cc/trees/layer_tree_host_common.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <memory>
@@ skipping 10198 matching lines @@
   scroll_parent5.id = 8;
   scroll_parent5.owner_id = parent5->id();
   scroll_parent5.contains_non_fast_scrollable_region = true;
   scroll_parent5.bounds = gfx::Size(10, 10);
   scroll_parent5.should_flatten = true;
   scroll_parent5.user_scrollable_horizontal = true;
   scroll_parent5.user_scrollable_vertical = true;
   scroll_parent5.transform_id = parent5->transform_tree_index();
   expected_scroll_tree.Insert(scroll_parent5, 1);
 
-  expected_scroll_tree.SetScrollOffset(parent2->id(), gfx::ScrollOffset(0, 0));
-  expected_scroll_tree.SetScrollOffset(child7->id(), gfx::ScrollOffset(0, 0));
-  expected_scroll_tree.SetScrollOffset(grand_child11->id(),
-                                       gfx::ScrollOffset(0, 0));
+  gfx::ScrollOffset offset;
+  gfx::ScrollOffset overscroll;
+  expected_scroll_tree.SetScrollOffset(parent2->id(), offset, overscroll);
+  expected_scroll_tree.SetScrollOffset(child7->id(), offset, overscroll);
+  expected_scroll_tree.SetScrollOffset(grand_child11->id(), offset, overscroll);
   expected_scroll_tree.set_needs_update(false);
 
   EXPECT_EQ(expected_scroll_tree, scroll_tree);
 
   // Check other layers' scroll_tree_index
   EXPECT_EQ(scroll_root1.id, page_scale_layer->scroll_tree_index());
   EXPECT_EQ(scroll_child6.id, grand_child10->scroll_tree_index());
   EXPECT_EQ(scroll_root1.id, parent3->scroll_tree_index());
   EXPECT_EQ(scroll_child7.id, child8->scroll_tree_index());
   EXPECT_EQ(scroll_root1.id, parent4->scroll_tree_index());
   EXPECT_EQ(scroll_root1.id, child9->scroll_tree_index());
   EXPECT_EQ(scroll_root1.id, grand_child12->scroll_tree_index());
 }
 
 }  // namespace
 }  // namespace cc