cc: Simplify picture layer tiling update tile priorities.

cc/resources/picture_layer_tiling_set.cc

Index: cc/resources/picture_layer_tiling_set.cc
diff --git a/cc/resources/picture_layer_tiling_set.cc b/cc/resources/picture_layer_tiling_set.cc
index c8ac64822f7b0f42c49f55e2f31febb6d0eec3f2..862ecc4101634f49f99b2b11ff30b2a42ee056ea 100644
--- a/cc/resources/picture_layer_tiling_set.cc
+++ b/cc/resources/picture_layer_tiling_set.cc
@@ -303,36 +303,24 @@ PictureLayerTilingSet::CoverageIterator::operator bool() const {
 
 void PictureLayerTilingSet::UpdateTilePriorities(
     WhichTree tree,
-    const gfx::Size& device_viewport,
     const gfx::Rect& viewport_in_content_space,
     const gfx::Rect& visible_content_rect,
-    const gfx::Size& last_layer_bounds,
-    const gfx::Size& current_layer_bounds,
-    float last_layer_contents_scale,
-    float current_layer_contents_scale,
-    const gfx::Transform& last_screen_transform,
-    const gfx::Transform& current_screen_transform,
+    float layer_contents_scale,
     double current_frame_time_in_seconds,
     size_t max_tiles_for_interest_area) {
   gfx::Rect viewport_in_layer_space = gfx::ScaleToEnclosingRect(
       viewport_in_content_space,
-      1.f / current_layer_contents_scale);
+      1.f / layer_contents_scale);
   gfx::Rect visible_layer_rect = gfx::ScaleToEnclosingRect(
       visible_content_rect,
-      1.f / current_layer_contents_scale);
+      1.f / layer_contents_scale);
 
   for (size_t i = 0; i < tilings_.size(); ++i) {
     tilings_[i]->UpdateTilePriorities(
         tree,
-        device_viewport,
         viewport_in_layer_space,
         visible_layer_rect,
-        last_layer_bounds,
-        current_layer_bounds,
-        last_layer_contents_scale,
-        current_layer_contents_scale,
-        last_screen_transform,
-        current_screen_transform,
+        layer_contents_scale,
         current_frame_time_in_seconds,
         max_tiles_for_interest_area);
   }