2 files changed, 18 insertions, 0 deletions
diff --git a/cc/test/layer_tree_host_common_test.h b/cc/test/layer_tree_host_common_test.h
index 2a66715..1717d13 100644
--- a/cc/test/layer_tree_host_common_test.h
+++ b/cc/test/layer_tree_host_common_test.h
@@ -159,6 +159,14 @@ class LayerTreeHostCommonTest : public LayerTreeHostCommonTestBase,
  public:
   LayerTreeHostCommonTest();
   explicit LayerTreeHostCommonTest(const LayerTreeSettings& settings);
+
+ protected:
+  static void SetScrollOffsetDelta(LayerImpl* layer_impl,
+                                   const gfx::Vector2dF& delta) {
+    layer_impl->SetCurrentScrollOffset(
+        layer_impl->synced_scroll_offset()->ActiveBase() +
+        gfx::ScrollOffset(delta));
+  }
 };
 
 }  // namespace cc
diff --git a/cc/test/layer_tree_test.h b/cc/test/layer_tree_test.h
index 5a7f111..2b9a91a 100644
--- a/cc/test/layer_tree_test.h
+++ b/cc/test/layer_tree_test.h
@@ -191,6 +191,16 @@ class LayerTreeTest : public testing::Test, public TestHooks {
 
   bool IsRemoteTest() const;
 
+  static gfx::Vector2dF ScrollDelta(LayerImpl* layer_impl) {
+    if (layer_impl->IsActive())
+      return gfx::Vector2dF(layer_impl->synced_scroll_offset()->Delta().x(),
+                            layer_impl->synced_scroll_offset()->Delta().y());
+    else
+      return gfx::Vector2dF(
+          layer_impl->synced_scroll_offset()->PendingDelta().get().x(),
+          layer_impl->synced_scroll_offset()->PendingDelta().get().y());
+  }
+
  private:
   LayerTreeSettings settings_;
   LayerSettings layer_settings_;