replace memcmp with MagicCmp that supports '.' for single character of anythi...

net/base/mime_sniffer_unittest.cc

Index: net/base/mime_sniffer_unittest.cc
===================================================================
--- net/base/mime_sniffer_unittest.cc	(revision 70720)
+++ net/base/mime_sniffer_unittest.cc	(working copy)
@@ -85,6 +85,9 @@
     { "\xFF\xD8\xFF\x23\x49\xAF", sizeof("\xFF\xD8\xFF\x23\x49\xAF")-1,
       "http://www.example.com/foo",
       "", "image/jpeg" },
+    { "RIFF\xd4\x32\0\0WEBPVP8 ", sizeof("RIFF\xd4\x32\0\0WEBPVP8 ")-1,
+      "http://www.example.com/foo",
+      "text/plain", "image/webp" },
   };
 
   TestArray(tests, arraysize(tests));