Removing x-x509-user-cert mime handler.

net/base/filename_util_internal.cc

Index: net/base/filename_util_internal.cc
diff --git a/net/base/filename_util_internal.cc b/net/base/filename_util_internal.cc
index cdfb03c7a2e57b6b6f7e49dd41ac381029e3cfe7..d2143473633005b8b87ed42df90d27fce1b24ffb 100644
--- a/net/base/filename_util_internal.cc
+++ b/net/base/filename_util_internal.cc
@@ -245,6 +245,9 @@ base::string16 GetSuggestedFilenameImpl(
   if (filename.empty() && !suggested_name.empty())
     filename = suggested_name;
 
+  if (filename.empty() && mime_type == "application/x-x509-user-cert")
+    filename = "user.crt";

[asanka, 2016/01/11 21:16:34]

Let's move this logic to DownloadTargetDeterminer in //chrome. I.e. let the
DoGenerateTargetPath step in DTD override the filename or the extension based on
the MIME type.

Special casing of application/x-x509-user-cert doesn't belong in //net. The
special handling exists in //chrome.

[svaldez, 2016/01/11 21:34:55]

Done.

+
   // Now try extracting the filename from the URL.  GetFileNameFromURL() only
   // looks at the last component of the URL and doesn't return the hostname as a
   // failover.