Cache IsNonBrowserProcess values, so we only take a loader-lock the first time.

chrome_elf/blacklist/test/blacklist_test_main_dll.cc

Index: chrome_elf/blacklist/test/blacklist_test_main_dll.cc
diff --git a/chrome_elf/blacklist/test/blacklist_test_main_dll.cc b/chrome_elf/blacklist/test/blacklist_test_main_dll.cc
index 54e5eb8af96db901b87929806d6648643c2020b2..64a7d41710e920289a9882edc8f2da5a4232f19a 100644
--- a/chrome_elf/blacklist/test/blacklist_test_main_dll.cc
+++ b/chrome_elf/blacklist/test/blacklist_test_main_dll.cc
@@ -5,11 +5,13 @@
 #include <windows.h>
 
 #include "chrome_elf/blacklist/blacklist.h"
+#include "chrome_elf/chrome_elf_util.h"
 
 extern "C" void InitBlacklistTestDll() {}
 
 BOOL APIENTRY DllMain(HMODULE module, DWORD reason, LPVOID reserved) {
   if (reason == DLL_PROCESS_ATTACH) {
+    InitializeIsNonBrowserProcess();
     blacklist::Initialize(true);  // force always on, no beacon
   }