Add more size_t -> int warning fixes for the win x64 GN build.

cc/BUILD.gn

Index: cc/BUILD.gn
diff --git a/cc/BUILD.gn b/cc/BUILD.gn
index b97bb6c65d210a8ff3144612bbf64ac171e37552..16cdf7f99c2fda283fb6da2acf4305c3e0d31baa 100644
--- a/cc/BUILD.gn
+++ b/cc/BUILD.gn
@@ -867,6 +867,8 @@ if (!is_win || link_chrome_on_windows) {
       "test/run_all_unittests.cc",
     ]
 
+    configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
+
     deps = [
       ":cc",
       ":test_support",
@@ -905,6 +907,8 @@ test("cc_perftests") {
     "trees/occlusion_tracker_perftest.cc",
   ]
 
+  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
+
   deps = [
     ":cc",
     ":test_support",