cc: Simplify picture layer tiling update tile priorities.

cc/resources/picture_layer_tiling_set.cc

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/resources/picture_layer_tiling_set.h"
 
 #include <limits>
 
 namespace cc {
 
@@ skipping 285 matching lines @@
   return *this;
 }
 
 PictureLayerTilingSet::CoverageIterator::operator bool() const {
   return current_tiling_ < static_cast<int>(set_->tilings_.size()) ||
       region_iter_.has_rect();
 }
 
 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);
   }
 }
 
 void PictureLayerTilingSet::DidBecomeActive() {
   for (size_t i = 0; i < tilings_.size(); ++i)
     tilings_[i]->DidBecomeActive();
 }
 
@@ skipping 10 matching lines @@
 }
 
 size_t PictureLayerTilingSet::GPUMemoryUsageInBytes() const {
   size_t amount = 0;
   for (size_t i = 0; i < tilings_.size(); ++i)
     amount += tilings_[i]->GPUMemoryUsageInBytes();
   return amount;
 }
 
 }  // namespace cc