Add new tab startup test to the linux & mac build.

base/test_file_util_posix.cc

Index: base/test_file_util_posix.cc
diff --git a/base/test_file_util_posix.cc b/base/test_file_util_posix.cc
index 38aaae2b5036465eb6894f6fe8e8bd47812ff6b8..ce36091cbebeb03fd43f81bd72c8ef09e0bedd47 100644
--- a/base/test_file_util_posix.cc
+++ b/base/test_file_util_posix.cc
@@ -63,8 +63,7 @@ bool CopyRecursiveDirNoCache(const std::wstring& source_dir,
           errno = 0;
           FilePath source_path(ent->fts_path);
           if (CopyFile(source_path, target_path)) {
-            bool success = EvictFileFromSystemCache(
-                target_path.Append(source_path.BaseName()));
+            bool success = EvictFileFromSystemCache(target_path);
             DCHECK(success);
           } else {
             error = errno ? errno : EINVAL;