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

cc/resources/picture_layer_tiling.cc

Index: cc/resources/picture_layer_tiling.cc
diff --git a/cc/resources/picture_layer_tiling.cc b/cc/resources/picture_layer_tiling.cc
index 0229879da606154bf09e76d505383be0bb7c2178..ee17dc8f9b10810e297a2aef47ac414eceb56890 100644
--- a/cc/resources/picture_layer_tiling.cc
+++ b/cc/resources/picture_layer_tiling.cc
@@ -536,7 +536,7 @@ gfx::Rect PictureLayerTiling::ComputeSkewport(
 
 void PictureLayerTiling::UpdateTilePriorities(
     WhichTree tree,
-    const gfx::Rect& visible_layer_rect,
+    const gfx::Rect& viewport_in_layer_space,
     float ideal_contents_scale,
     double current_frame_time_in_seconds,
     const Occlusion& occlusion_in_layer_space) {
@@ -547,7 +547,7 @@ void PictureLayerTiling::UpdateTilePriorities(
   }
 
   gfx::Rect visible_rect_in_content_space =
-      gfx::ScaleToEnclosingRect(visible_layer_rect, contents_scale_);
+      gfx::ScaleToEnclosingRect(viewport_in_layer_space, contents_scale_);
 
   if (tiling_size().IsEmpty()) {
     last_impl_frame_time_in_seconds_ = current_frame_time_in_seconds;