cc: Fix build issues for adding ‘chromium_code’: 1 to cc.gyp and cc_tests.gyp

cc/resources/picture_layer_tiling_set.cc

Index: cc/resources/picture_layer_tiling_set.cc
diff --git a/cc/resources/picture_layer_tiling_set.cc b/cc/resources/picture_layer_tiling_set.cc
index f3c73c2d04f9b3e56c0139b6953f1f64495ac182..b5460b9dddf419538f44a387ab63b30a0a7d06a6 100644
--- a/cc/resources/picture_layer_tiling_set.cc
+++ b/cc/resources/picture_layer_tiling_set.cc
@@ -4,6 +4,8 @@
 
 #include "cc/resources/picture_layer_tiling_set.h"
 
+#include <limits>
+
 namespace cc {
 
 namespace {
@@ -133,7 +135,11 @@ PictureLayerTilingSet::CoverageIterator::CoverageIterator(
     }
   }
 
-  if (ideal_tiling_ == set_->tilings_.size() && ideal_tiling_ > 0)
+  DCHECK_LE(set_->tilings_.size(),
+            static_cast<size_t>(std::numeric_limits<int>::max()));
+
+  int num_tilings = set_->tilings_.size();
+  if (ideal_tiling_ == num_tilings && ideal_tiling_ > 0)
     ideal_tiling_--;
 
   ++(*this);