base: Remove deprecated file_util::GetFilenameFromPath function.

base/file_util_unittest.cc

Index: base/file_util_unittest.cc
diff --git a/base/file_util_unittest.cc b/base/file_util_unittest.cc
index 4aaed901e80b610a8e178e715c2fc9ac34f7aac1..fa00fcf92c2426c7a409c0172791c486bc05150e 100644
--- a/base/file_util_unittest.cc
+++ b/base/file_util_unittest.cc
@@ -251,17 +251,6 @@ static const struct filename_case {
 #endif
 };
 
-#if defined(OS_WIN)
-// This function is deprecated on non-Windows.
-TEST_F(FileUtilTest, GetFilenameFromPath) {
-  for (unsigned int i = 0; i < arraysize(filename_cases); ++i) {
-    const filename_case& value = filename_cases[i];
-    std::wstring result = file_util::GetFilenameFromPath(value.path);
-    EXPECT_EQ(value.filename, result);
-  }
-}
-#endif
-
 // Test finding the file type from a path name
 static const struct extension_case {
   const wchar_t* path;