Revert "[Coverage] Revise format to reduce binary size"

This reverts commit e18531595bba495946aa52c0a16b9f9238cff8bc.

On Windows, there is an error:

http://lab.llvm.org:8011/builders/sanitizer-windows/builds/54963/steps/stage%201%20check/logs/stdio

error: C:\b\slave\sanitizer-windows\build\stage1\projects\compiler-rt\test\profile\Profile-x86_64\Output\instrprof-merging.cpp.tmp.v1.o: Failed to load coverage: Malformed coverage data

1 files changed, 0 insertions, 25 deletions

diff --git a/llvm/unittests/ProfileData/CoverageMappingTest.cpp b/llvm/unittests/ProfileData/CoverageMappingTest.cpp
index 4854b7f..82e7574 100644
--- a/llvm/unittests/ProfileData/CoverageMappingTest.cpp
+++ b/llvm/unittests/ProfileData/CoverageMappingTest.cpp
@@ -895,29 +895,4 @@ INSTANTIATE_TEST_CASE_P(ParameterizedCovMapTest, CoverageMappingTest,
                                           std::pair<bool, bool>({true, false}),
                                           std::pair<bool, bool>({true, true})),);
 
-TEST(CoverageMappingTest, filename_roundtrip) {
-  std::vector<StringRef> Paths({"a", "b", "c", "d", "e"});
-
-  for (bool Compress : {false, true}) {
-    std::string EncodedFilenames;
-    {
-      raw_string_ostream OS(EncodedFilenames);
-      CoverageFilenamesSectionWriter Writer(Paths);
-      Writer.write(OS, Compress);
-    }
-
-    std::vector<StringRef> ReadFilenames;
-    RawCoverageFilenamesReader Reader(EncodedFilenames, ReadFilenames);
-    BinaryCoverageReader::DecompressedData Decompressed;
-    EXPECT_THAT_ERROR(Reader.read(CovMapVersion::CurrentVersion, Decompressed),
-                      Succeeded());
-    if (!Compress)
-      ASSERT_EQ(Decompressed.size(), 0U);
-
-    ASSERT_EQ(ReadFilenames.size(), Paths.size());
-    for (unsigned I = 0; I < Paths.size(); ++I)
-      ASSERT_TRUE(ReadFilenames[I] == Paths[I]);
-  }
-}
-
 } // end anonymous namespace