Update SplitString calls to new form

media/formats/mp4/track_run_iterator_unittest.cc

Index: media/formats/mp4/track_run_iterator_unittest.cc
diff --git a/media/formats/mp4/track_run_iterator_unittest.cc b/media/formats/mp4/track_run_iterator_unittest.cc
index 6bfab113cf954f16b3e26587e9d3bf79e335d18d..f9dde7204f1c169dd313739820a0743b906c2283 100644
--- a/media/formats/mp4/track_run_iterator_unittest.cc
+++ b/media/formats/mp4/track_run_iterator_unittest.cc
@@ -146,8 +146,8 @@ class TrackRunIteratorTest : public testing::Test {
     // ON - SampleDependsOnOthers & IsNonSyncSample
     // NS - SampleDependsOnNoOthers & IsSyncSample
     // NN - SampleDependsOnNoOthers & IsNonSyncSample
-    std::vector<std::string> flags_data;
-    base::SplitString(sample_info, ' ', &flags_data);
+    std::vector<std::string> flags_data = base::SplitString(
+        sample_info, " ", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
 
     if (flags_data.size() == 1u) {
       // Simulates the first_sample_flags_present set scenario,