If the URL text has no scheme, and starts with ftp., then ...

chrome/browser/url_fixer_upper.cc

 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <algorithm>
 #include <windows.h>
 
 #include "chrome/browser/url_fixer_upper.h"
 
 #include "base/file_util.h"
@@ skipping 269 matching lines @@
         // We need to fix up the segmentation for "www.example.com:/".  For this
         // case, we guess that schemes with a "." are not actually schemes.
         (scheme.find(L".") != wstring::npos) ||
         // We need to fix up the segmentation for "www:123/".  For this case, we
         // will add an HTTP scheme later and make the URL parser happy.
         // TODO(pkasting): Maybe we should try to use GURL's parser for this?
         HasPort(text, parts->scheme, scheme)))
       parts->scheme.reset();
   }
 
-  // Check to see if we've found a scheme we liked.
-  int scheme_end;
-  if (parts->scheme.is_valid()) {
-    // Remember the end of the scheme.
-    scheme_end = parts->scheme.end();
-  } else {
-    // Having been unable to extract a scheme, we default to HTTP.
-    scheme.assign(L"http");
-    scheme_end = 0;
-  }
+  // When we couldn't find a scheme in the input, we need to pick one.  Normally
+  // we choose http, but if the URL starts with "ftp.", we match other browsers
+  // and choose ftp.
+  if (!parts->scheme.is_valid())
+    scheme.assign(StartsWith(text, L"ftp.", false) ? L"ftp" : L"http");
 
   // Cannonicalize the scheme.
   StringToLowerASCII(&scheme);
 
   // Not segmenting file schemes or nonstandard schemes.
   if ((scheme == L"file") ||
       !url_util::IsStandard(scheme.c_str(), static_cast<int>(scheme.length()),
           url_parse::Component(0, static_cast<int>(scheme.length()))))
     return scheme;
 
@@ skipping 125 matching lines @@
     GURL file_url = net::FilePathToFileURL(full_path);
     if (file_url.is_valid())
       return gfx::ElideUrl(file_url, ChromeFont(), 0, std::wstring());
     // Invalid files fall through to regular processing.
   }
 
   // Fall back on regular fixup for this input.
   return FixupURL(text, L"");
 }