cc: Simplify picture layer tiling update tile priorities.

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 0826186f4df64540bcb5ae86521a2d7f17c3b5bc..29b4bd3292c4517dc59371cd9038f16c5fafeb6a 100644
--- a/cc/layers/picture_layer_impl.cc
+++ b/cc/layers/picture_layer_impl.cc
@@ -351,15 +351,9 @@ void PictureLayerImpl::UpdateTilePriorities() {
       layer_tree_impl()->settings().max_tiles_for_interest_area;
   tilings_->UpdateTilePriorities(
       tree,
-      viewport_size,
       viewport_in_content_space,
       visible_content_rect(),
-      last_bounds_,
-      bounds(),
-      last_content_scale_,
       contents_scale_x(),
-      last_screen_space_transform_,
-      current_screen_space_transform,
       current_frame_time_in_seconds,
       max_tiles_for_interest_area);
 
@@ -726,7 +720,7 @@ void PictureLayerImpl::MarkVisibleResourcesAsRequired() const {
       // This iteration is over the visible content rect which is potentially
       // less conservative than projecting the viewport into the layer.
       // Ignore tiles that are know to be outside the viewport.
-      if (iter->priority(PENDING_TREE).distance_to_visible_in_pixels != 0)
+      if (iter->priority(PENDING_TREE).distance_to_visible != 0)

[enne (OOO), 2014/01/31 23:33:36]

I think this can go away as we only mark tiles in the visible content rect as
visible and this loop is only iterating over tiles in that rect.

[vmpstr, 2014/02/03 20:27:24]

Good point. Done.

         continue;
 
       missing_region.Subtract(iter.geometry_rect());
@@ -795,7 +789,7 @@ bool PictureLayerImpl::MarkVisibleTilesAsRequired(
     // This iteration is over the visible content rect which is potentially
     // less conservative than projecting the viewport into the layer.
     // Ignore tiles that are know to be outside the viewport.
-    if (tile->priority(PENDING_TREE).distance_to_visible_in_pixels != 0)
+    if (tile->priority(PENDING_TREE).distance_to_visible != 0)
       continue;
 
     // If the missing region doesn't cover it, this tile is fully