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

content/test/BUILD.gn

 # Copyright 2014 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.
 
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//build/module_args/v8.gni")
 import("//testing/test.gni")
 import("//third_party/mojo/src/mojo/public/tools/bindings/mojom.gni")
@@ skipping 239 matching lines @@
 # TODO(GYP) enable content_browsertests on Mac when it links.
 if (!is_mac && (!is_win || link_chrome_on_windows)) {
   test("content_browsertests") {
     sources =
         rebase_path(content_tests_gypi_values.content_browsertests_sources,
                     ".",
                     "//content")
 
     defines = [ "HAS_OUT_OF_PROC_TEST_RUNNER" ]
 
+    configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
+
     deps = [
       ":browsertest_support",
       ":web_ui_test_mojo_bindings",
       "//base/allocator",
       "//base/test:test_support",
       "//content/common:mojo_bindings",
       "//content/gpu",
       "//content/public/common",
       "//content/public/plugin",
       "//content/public/renderer",
@@ skipping 426 matching lines @@
       "//content/public/common",
       "//testing/gtest",
       "//third_party/WebKit/public:blink",
       "//ui/base",
       "//ui/gfx",
       "//ui/gfx/geometry",
       "//ui/gl",
     ]
   }
 }