Replace base::str[n]casecmp with helper functions.

net/url_request/url_request_http_job_unittest.cc

Index: net/url_request/url_request_http_job_unittest.cc
diff --git a/net/url_request/url_request_http_job_unittest.cc b/net/url_request/url_request_http_job_unittest.cc
index fde6568d73916dff991deaa307de82f56f93a117..80e421628a48d9745e1d1cd32a8d34f96e504523 100644
--- a/net/url_request/url_request_http_job_unittest.cc
+++ b/net/url_request/url_request_http_job_unittest.cc
@@ -77,7 +77,7 @@ class URLRequestHttpJobTest : public ::testing::Test {
     for (const std::string& token :
          base::SplitString(encoding_headers, ", ", base::KEEP_WHITESPACE,
                            base::SPLIT_WANT_NONEMPTY)) {
-      if (!base::strncasecmp(token.data(), "sdch", token.length()))
+      if (base::EqualsCaseInsensitiveASCII(token, "sdch"))
         return true;
     }
     return false;