Replace use of ASSERT in test code.

webrtc/base/optionsfile_unittest.cc

Index: webrtc/base/optionsfile_unittest.cc
diff --git a/webrtc/base/optionsfile_unittest.cc b/webrtc/base/optionsfile_unittest.cc
index bc3d38ee1b6437a71a3989efa98b681e0cd007ce..4eaf8015f2daac104f30d5ac558697aa18cbe651 100644
--- a/webrtc/base/optionsfile_unittest.cc
+++ b/webrtc/base/optionsfile_unittest.cc
@@ -10,6 +10,7 @@
 
 #include <memory>
 
+#include "webrtc/base/checks.h"
 #include "webrtc/base/fileutils.h"
 #include "webrtc/base/gunit.h"
 #include "webrtc/base/optionsfile.h"
@@ -46,7 +47,7 @@ class MAYBE_OptionsFileTest : public testing::Test {
  public:
   MAYBE_OptionsFileTest() {
     Pathname dir;
-    ASSERT(Filesystem::GetTemporaryFolder(dir, true, NULL));
+    RTC_CHECK(Filesystem::GetTemporaryFolder(dir, true, NULL));
     test_file_ = Filesystem::TempFilename(dir, ".testfile");
     OpenStore();
   }