Cache viewport rect for tile priority in UpdateTiles

cc/test/fake_picture_layer_impl.h

Index: cc/test/fake_picture_layer_impl.h
diff --git a/cc/test/fake_picture_layer_impl.h b/cc/test/fake_picture_layer_impl.h
index 5795d5588ede6018d75f7e24a7464c39cadcbbba..a0e16e8345671277ad0f698daf5f6d4a15ab38c7 100644
--- a/cc/test/fake_picture_layer_impl.h
+++ b/cc/test/fake_picture_layer_impl.h
@@ -77,7 +77,6 @@ class FakePictureLayerImpl : public PictureLayerImpl {
   using PictureLayerImpl::CleanUpTilingsOnActiveLayer;
   using PictureLayerImpl::CanHaveTilings;
   using PictureLayerImpl::MinimumContentsScale;
-  using PictureLayerImpl::GetViewportForTilePriorityInContentSpace;
   using PictureLayerImpl::SanityCheckTilingState;
   using PictureLayerImpl::GetRecycledTwinLayer;
   using PictureLayerImpl::UpdateRasterSource;
@@ -108,6 +107,10 @@ class FakePictureLayerImpl : public PictureLayerImpl {
     return visible_rect_for_tile_priority_;
   }
 
+  gfx::Rect viewport_rect_for_tile_priority_in_content_space() {
+    return viewport_rect_for_tile_priority_in_content_space_;
+  }
+
   void set_fixed_tile_size(const gfx::Size& size) { fixed_tile_size_ = size; }
 
   void CreateAllTiles();