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

cc/test/tiled_layer_test_common.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/test/tiled_layer_test_common.h"
 
 namespace cc {
 
 FakeLayerUpdater::Resource::Resource(FakeLayerUpdater* layer,
                                      scoped_ptr<PrioritizedResource> texture)
@@ skipping 109 matching lines @@
 }
 
 void FakeTiledLayer::UpdateContentsScale(float ideal_contents_scale) {
   CalculateContentsScale(ideal_contents_scale,
                          &draw_properties().contents_scale_x,
                          &draw_properties().contents_scale_y,
                          &draw_properties().content_bounds);
 }
 
 void FakeTiledLayer::ResetNumDependentsNeedPushProperties() {
-  size_t num = 0;
+  int num = 0;
   if (mask_layer()) {
     if (mask_layer()->needs_push_properties() ||
         mask_layer()->descendant_needs_push_properties())
       ++num;
   }
   if (replica_layer()) {
     if (replica_layer()->needs_push_properties() ||
         replica_layer()->descendant_needs_push_properties())
       ++num;
   }
@@ skipping 21 matching lines @@
     float* contents_scale_y,
     gfx::Size* content_bounds) {
   *contents_scale_x =
       static_cast<float>(forced_content_bounds_.width()) / bounds().width();
   *contents_scale_y =
       static_cast<float>(forced_content_bounds_.height()) / bounds().height();
   *content_bounds = forced_content_bounds_;
 }
 
 }  // namespace cc