Remove some legacy versions of StartsWith and EndsWith.

media/filters/chunk_demuxer_unittest.cc

Index: media/filters/chunk_demuxer_unittest.cc
diff --git a/media/filters/chunk_demuxer_unittest.cc b/media/filters/chunk_demuxer_unittest.cc
index f974241dbc38d464b3f78f3fbded98c887d86c00..7cf841a0062030fd7d8525d9234a0dc6a0980b7b 100644
--- a/media/filters/chunk_demuxer_unittest.cc
+++ b/media/filters/chunk_demuxer_unittest.cc
@@ -449,7 +449,7 @@ class ChunkDemuxerTest : public ::testing::Test {
       block_info.flags = 0;
       block_info.duration = 0;
 
-      if (base::EndsWith(timestamp_str, "K", true)) {
+      if (base::EndsWith(timestamp_str, "K", base::CompareCase::SENSITIVE)) {
         block_info.flags = kWebMFlagKeyframe;
         // Remove the "K" off of the token.
         timestamp_str = timestamp_str.substr(0, timestamps[i].length() - 1);
@@ -1082,7 +1082,7 @@ class ChunkDemuxerTest : public ::testing::Test {
         ss << "K";
 
       // Handle preroll buffers.
-      if (base::EndsWith(timestamps[i], "P", true)) {
+      if (base::EndsWith(timestamps[i], "P", base::CompareCase::SENSITIVE)) {
         ASSERT_EQ(kInfiniteDuration(), buffer->discard_padding().first);
         ASSERT_EQ(base::TimeDelta(), buffer->discard_padding().second);
         ss << "P";