Move MaxScrollOffset to property_trees

cc/test/layer_tree_host_common_test.cc

Index: cc/test/layer_tree_host_common_test.cc
diff --git a/cc/test/layer_tree_host_common_test.cc b/cc/test/layer_tree_host_common_test.cc
index f40926b4998646b290c8c446d1f3516ca9983756..1336b613e485ee2b207934471bdfaec3aa383053 100644
--- a/cc/test/layer_tree_host_common_test.cc
+++ b/cc/test/layer_tree_host_common_test.cc
@@ -102,7 +102,8 @@ void LayerTreeHostCommonTestBase::
 
   bool can_render_to_separate_surface = true;
 
-  Layer* page_scale_layer = nullptr;
+  const Layer* page_scale_layer =
+      root_layer->layer_tree_host()->page_scale_layer();
   Layer* inner_viewport_scroll_layer =
       root_layer->layer_tree_host()->inner_viewport_scroll_layer();
   Layer* outer_viewport_scroll_layer =
@@ -168,7 +169,8 @@ void LayerTreeHostCommonTestBase::ExecuteCalculateDrawProperties(
     bool can_use_lcd_text,
     bool layers_always_allowed_lcd_text) {
   host_impl()->active_tree()->SetDeviceScaleFactor(device_scale_factor);
-  host_impl()->active_tree()->SetPageScaleOnActiveTree(page_scale_factor);
+  host_impl()->active_tree()->SetPageScaleOnActiveTreeForTesting(
+      page_scale_factor);
 
   gfx::Transform identity_matrix;
   gfx::Size device_viewport_size =