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_(0u),
       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 148 matching lines @@
 
 void Layer::SetNeedsPushProperties() {
   if (needs_push_properties_)
     return;
   if (!parent_should_know_need_push_properties() && parent_)
     parent_->AddDependentNeedsPushProperties();
   needs_push_properties_ = true;
 }
 
 void Layer::AddDependentNeedsPushProperties() {
-  DCHECK_GE(num_dependents_need_push_properties_, 0);
-
   if (!parent_should_know_need_push_properties() && parent_)
     parent_->AddDependentNeedsPushProperties();
 
   num_dependents_need_push_properties_++;
 }
 
 void Layer::RemoveDependentNeedsPushProperties() {
+  DCHECK_GT(num_dependents_need_push_properties_, 0u);
   num_dependents_need_push_properties_--;
-  DCHECK_GE(num_dependents_need_push_properties_, 0);
 
   if (!parent_should_know_need_push_properties() && parent_)
       parent_->RemoveDependentNeedsPushProperties();
 }
 
 bool Layer::IsPropertyChangeAllowed() const {
   if (!layer_tree_host_)
     return true;
 
   if (!layer_tree_host_->settings().strict_layer_property_change_checking)
@@ skipping 1414 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