Fix size_t to int conversion compile error.

src/compiler/js-inlining.cc

Index: src/compiler/js-inlining.cc
diff --git a/src/compiler/js-inlining.cc b/src/compiler/js-inlining.cc
index 2936be49b3d0bd8b7ced8434f43eb2ad5db7d404..daee92b87a0931e84fb97494614c393d75f527c7 100644
--- a/src/compiler/js-inlining.cc
+++ b/src/compiler/js-inlining.cc
@@ -171,8 +171,8 @@ class CopyVisitor : public NullNodeVisitor {
 
     // Reuse the operator in the copy. This assumes that op lives in a zone
     // that lives longer than graph()'s zone.
-    Node* copy =
-        target_graph_->NewNode(original->op(), inputs.size(), &inputs.front());
+    Node* copy = target_graph_->NewNode(
+        original->op(), static_cast<int>(inputs.size()), &inputs.front());
     copies_[original->id()] = copy;
     return GenericGraphVisit::CONTINUE;
   }