Move LowerCaseEqualsASCII to base namespace

Remove url:: variants. Add the 4-element version from url:: to base::

Review URL: https://codereview.chromium.org/1172753003

Cr-Commit-Position: refs/heads/master@{#333597}


CrOS-Libchrome-Original-Commit: bc17d2c8d864a118f48a84de0709f5a6c463cffd
diff --git a/base/files/file_util_unittest.cc b/base/files/file_util_unittest.cc
index 1d8eeef..52581f8 100644
--- a/base/files/file_util_unittest.cc
+++ b/base/files/file_util_unittest.cc
@@ -2498,7 +2498,9 @@
   ASSERT_EQ(0, pipe(fds));
   const int write_end = fds[1];
   ScopedFD read_end_closer(fds[0]);
-  { ScopedFD write_end_closer(fds[1]); }
+  {
+    ScopedFD write_end_closer(fds[1]);
+  }
   // This is the only thread. This file descriptor should no longer be valid.
   int ret = close(write_end);
   EXPECT_EQ(-1, ret);