Fixed "blocking io" from FixupPath on UI thread.

net/base/filename_util.h

 // Copyright 2014 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_FILENAME_UTIL_H_
 #define NET_BASE_FILENAME_UTIL_H_
 
 #include <string>
 
 #include "base/strings/string16.h"
 #include "net/base/net_export.h"
 
 class GURL;
 
 namespace base {
 class FilePath;
 }
 
 namespace  net {
 
 // Given the full path to a file name, creates a file: URL. The returned URL
 // may not be valid if the input is malformed.
+// Can be used only in IO thread because if adding current diretory to path
+// will indirectly do AssertIOAllowed

[davidben, 2015/04/14 16:26:22]

I think there may be some confusion here. AssertIOAllowed does not mean this is
only callable on the IO thread. The IO thread is the IPC and network IO thread
and should not have file IO.

 NET_EXPORT GURL FilePathToFileURL(const base::FilePath& path);
 
+// Variant of FilePathToFileURL, that doesn't add current direstory fo paths
+// that are recognized as relarive. Can be used on any thread.
+NET_EXPORT GURL FilePathToFileURLNoCWD(const base::FilePath& path);
+
 // Converts a file: URL back to a filename that can be passed to the OS. The
 // file URL must be well-formed (GURL::is_valid() must return true); we don't
 // handle degenerate cases here. Returns true on success, false if it isn't a
 // valid file URL. On failure, *file_path will be empty.
 NET_EXPORT bool FileURLToFilePath(const GURL& url, base::FilePath* file_path);
 
 // Generates a filename using the first successful method from the following (in
 // order):
 //
 // 1) The raw Content-Disposition header in |content_disposition| as read from
@@ skipping 72 matching lines @@
 //
 // Note: |mime_type| should only be non-empty if this function is called from a
 // thread that allows IO.
 NET_EXPORT void GenerateSafeFileName(const std::string& mime_type,
                                      bool ignore_extension,
                                      base::FilePath* file_path);
 
 }  // namespace net
 
 #endif  // NET_BASE_FILENAME_UTIL_H_