cc: Do not ignore layers without valid priorities during eviction.

cc/resources/eviction_tile_priority_queue.cc

 // Copyright 2014 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/eviction_tile_priority_queue.h"
 
 namespace cc {
 
 namespace {
 
@@ skipping 113 matching lines @@
 
 EvictionTilePriorityQueue::PairedPictureLayerQueue::PairedPictureLayerQueue() {
 }
 
 EvictionTilePriorityQueue::PairedPictureLayerQueue::PairedPictureLayerQueue(
     const PictureLayerImpl::Pair& layer_pair,
     TreePriority tree_priority)
     : active_iterator(
           layer_pair.active
               ? PictureLayerImpl::LayerEvictionTileIterator(layer_pair.active,
+                                                            layer_pair.pending,
                                                             tree_priority)
               : PictureLayerImpl::LayerEvictionTileIterator()),
       pending_iterator(
           layer_pair.pending
               ? PictureLayerImpl::LayerEvictionTileIterator(layer_pair.pending,
+                                                            layer_pair.active,
                                                             tree_priority)
               : PictureLayerImpl::LayerEvictionTileIterator()) {
 }
 
 EvictionTilePriorityQueue::PairedPictureLayerQueue::~PairedPictureLayerQueue() {
 }
 
 bool EvictionTilePriorityQueue::PairedPictureLayerQueue::IsEmpty() const {
   return !active_iterator && !pending_iterator;
 }
@@ skipping 63 matching lines @@
       active_tile->priority_for_tree_priority(tree_priority);
   const TilePriority& pending_priority =
       pending_tile->priority_for_tree_priority(tree_priority);
 
   if (pending_priority.IsHigherPriorityThan(active_priority))
     return ACTIVE_TREE;
   return PENDING_TREE;
 }
 
 }  // namespace cc