cc: Don't clip tile priority visible rect to content bounds.

cc/layers/picture_layer_impl.cc

Index: cc/layers/picture_layer_impl.cc
diff --git a/cc/layers/picture_layer_impl.cc b/cc/layers/picture_layer_impl.cc
index 3a9bdd9af3e651b105e589c058bda8d530a96d50..0c950ffb5ea719a1d7c9ee84c424a6adf214dc0c 100644
--- a/cc/layers/picture_layer_impl.cc
+++ b/cc/layers/picture_layer_impl.cc
@@ -516,12 +516,8 @@ gfx::Rect PictureLayerImpl::GetViewportForTilePriorityInContentSpace() const {
       visible_rect_in_content_space =
           gfx::ToEnclosingRect(MathUtil::ProjectClippedRect(
               view_to_layer, viewport_rect_for_tile_priority_));
-
-      visible_rect_in_content_space.Intersect(gfx::Rect(content_bounds()));
     }
   }
-
-  visible_rect_in_content_space.Intersect(visible_content_rect());
   return visible_rect_in_content_space;
 }
 
@@ -790,6 +786,7 @@ void PictureLayerImpl::MarkVisibleResourcesAsRequired() const {
   // can be independently overridden by embedders like Android WebView with
   // SetExternalDrawConstraints.
   gfx::Rect rect = GetViewportForTilePriorityInContentSpace();
+  rect.Intersect(visible_content_rect());
 
   float min_acceptable_scale =
       std::min(raster_contents_scale_, ideal_contents_scale_);