MemorySanitizer: improve the udev dynamic loading hack.

device/udev_linux/udev0_loader.cc

Index: device/udev_linux/udev0_loader.cc
diff --git a/device/udev_linux/udev0_loader.cc b/device/udev_linux/udev0_loader.cc
index d70b2f26cfbc16687a4ede02031d6af063222bb9..9faab97bc1296e5f981ac9a74a97882e3ea2ce5f 100644
--- a/device/udev_linux/udev0_loader.cc
+++ b/device/udev_linux/udev0_loader.cc
@@ -18,7 +18,14 @@ bool Udev0Loader::Init() {
   if (lib_loader_)
     return lib_loader_->loaded();
   lib_loader_.reset(new LibUdev0Loader);
+#if defined(MEMORY_SANITIZER)
+  // Temporary hack: rely on the symlink to pick up whichever *instrumented*
+  // version of libudev we have, be it libudev0 or libudev1. crbug.com/437464
+  // TODO(earthdok): Remove this hack after upgrading our LKGR builders.
+  return lib_loader_->Load("libudev.so");
+#else
   return lib_loader_->Load("libudev.so.0");
+#endif
 }
 
 const char* Udev0Loader::udev_device_get_action(udev_device* udev_device) {