cc: Fix size_t to int truncations in tiles/ and trees/

cc/layers/layer.cc

 // Copyright 2010 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/layers/layer.h"
 
 #include <algorithm>
 
 #include "base/atomic_sequence_num.h"
 #include "base/location.h"
@@ skipping 22 matching lines @@
 namespace cc {
 
 base::StaticAtomicSequenceNumber g_next_layer_id;
 
 scoped_refptr<Layer> Layer::Create(const LayerSettings& settings) {
   return make_scoped_refptr(new Layer(settings));
 }
 
 Layer::Layer(const LayerSettings& settings)
     : needs_push_properties_(false),
-      num_dependents_need_push_properties_(false),
+      num_dependents_need_push_properties_(0),
       stacking_order_changed_(false),
       // Layer IDs start from 1.
       layer_id_(g_next_layer_id.GetNext() + 1),
       ignore_set_needs_commit_(false),
       sorting_context_id_(0),
       parent_(nullptr),
       layer_tree_host_(nullptr),
       scroll_clip_layer_id_(INVALID_ID),
       num_descendants_that_draw_content_(0),
       transform_tree_index_(-1),
@@ skipping 1599 matching lines @@
           ? layer_tree_host()->meta_information_sequence_number()
           : 0;
 }
 
 bool Layer::sorted_for_recursion() {
   return sorted_for_recursion_tracker_ ==
          layer_tree_host()->meta_information_sequence_number();
 }
 
 }  // namespace cc