Fix layout test failures. Looks like keying the plugins based on OriginalFil...

chrome/browser/metrics_log.cc

Index: chrome/browser/metrics_log.cc
===================================================================
--- chrome/browser/metrics_log.cc	(revision 7888)
+++ chrome/browser/metrics_log.cc	(working copy)
@@ -458,7 +458,8 @@
     // Plugin name and filename are hashed for the privacy of those
     // testing unreleased new extensions.
     WriteAttribute("name", CreateBase64Hash(WideToUTF8(iter->name)));
-    WriteAttribute("filename", CreateBase64Hash(iter->filename));
+    WriteAttribute("filename",
+        CreateBase64Hash(WideToUTF8(iter->path.BaseName().ToWStringHack())));
     WriteAttribute("version", WideToUTF8(iter->version));
   }
 }