Fix bug 79905: Drag and drop of "DownloadURL" type ignores specified filename for data URLs.

net/base/net_util.h

 // Copyright (c) 2011 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.
 
 #ifndef NET_BASE_NET_UTIL_H_
 #define NET_BASE_NET_UTIL_H_
 #pragma once
 
 #include "build/build_config.h"
 
@@ skipping 227 matching lines @@
 // Both |name| and |raw_bytes| are escaped internally.
 NET_API std::string GetDirectoryListingEntry(const string16& name,
                                              const std::string& raw_bytes,
                                              bool is_dir, int64 size,
                                              base::Time modified);
 
 // If text starts with "www." it is removed, otherwise text is returned
 // unmodified.
 NET_API string16 StripWWW(const string16& text);
 
-// Gets the filename from the raw Content-Disposition header (as read from the
-// network).  Otherwise uses the last path component name or hostname from
-// |url|. If there is no filename or it can't be used, the given |default_name|,
-// will be used unless it is empty.
-
-// Note: it's possible for the suggested filename to be empty (e.g.,
-// file:///). referrer_charset is used as one of charsets
-// to interpret a raw 8bit string in C-D header (after interpreting
-// as UTF-8 fails). See the comment for GetFilenameFromCD for more details.
+// Gets the filename in the following order:
+// 1) the raw Content-Disposition header (as read from the network).
+//    |referrer_charset| is used as one of charsets to interpret a raw 8bit
+//    string in C-D header (after interpreting as UTF-8 fails).
+//    See the comment for GetFilenameFromCD for more details.
+// 2) the suggested name
+// 3) the last path component name or hostname from |url|
+// 4) the given |default_name|
+// 5) the hard-coded name "download", as the last resort
 NET_API string16 GetSuggestedFilename(const GURL& url,
                                       const std::string& content_disposition,
                                       const std::string& referrer_charset,
+                                      const std::string& suggested_name,
                                       const string16& default_name);
 
 // Checks the given port against a list of ports which are restricted by
 // default.  Returns true if the port is allowed, false if it is restricted.
 bool IsPortAllowedByDefault(int port);
 
 // Checks the given port against a list of ports which are restricted by the
 // FTP protocol.  Returns true if the port is allowed, false if it is
 // restricted.
 bool IsPortAllowedByFtp(int port);
@@ skipping 186 matching lines @@
 
 // Returns list of network interfaces except loopback interface. If an
 // interface has more than one address, a separate entry is added to
 // the list for each address.
 // Can be called only on a thread that allows IO.
 NET_API bool GetNetworkList(NetworkInterfaceList* networks);
 
 }  // namespace net
 
 #endif  // NET_BASE_NET_UTIL_H_