mac: Swizzle out +[NSBundle mainBundle] for in process browser tests.

chrome/test/BUILD.gn

Index: chrome/test/BUILD.gn
diff --git a/chrome/test/BUILD.gn b/chrome/test/BUILD.gn
index 7d9ae27e8485d7e654e11db7b65fb99d3701581f..299d0710f77b1b36e179a3f7ab138206441a040b 100644
--- a/chrome/test/BUILD.gn
+++ b/chrome/test/BUILD.gn
@@ -44,6 +44,8 @@ source_set("test_support") {
     "base/profile_mock.h",
     "base/scoped_browser_locale.cc",
     "base/scoped_browser_locale.h",
+    "base/scoped_bundle_swizzler_mac.h",
+    "base/scoped_bundle_swizzler_mac.mm",
     "base/scoped_testing_local_state.cc",
     "base/scoped_testing_local_state.h",
     "base/test_browser_window.cc",
@@ -162,6 +164,9 @@ source_set("test_support") {
   if (is_linux) {
     deps += [ "//crypto:platform" ]
   }
+  if (is_mac) {
+    # deps += [ '../third_party/ocmock/ocmock.gyp:ocmock' ] TODO(GYP)
+  }
   if (is_win) {
     deps += [ "//third_party/wtl" ]
     if (use_aura) {