Implement the V2 sandbox in the process launcher.

base/mac/bundle_locations.mm

Index: base/mac/bundle_locations.mm
diff --git a/base/mac/bundle_locations.mm b/base/mac/bundle_locations.mm
index 54021b85ee08c29ad26e1c3a258f9165a87eb4a4..78c0fac2e330d5566b8ea7dbada0e279b72631f2 100644
--- a/base/mac/bundle_locations.mm
+++ b/base/mac/bundle_locations.mm
@@ -47,6 +47,11 @@ FilePath FrameworkBundlePath() {
   return NSStringToFilePath([bundle bundlePath]);
 }
 
+std::string GetOuterBundleIdentifier() {
+  NSBundle* bundle = OuterBundle();
+  return base::SysNSStringToUTF8([bundle bundleIdentifier]);
+}
+
 static void AssignOverrideBundle(NSBundle* new_bundle,
                                  NSBundle** override_bundle) {
   if (new_bundle != *override_bundle) {