Add net/base/filename_util.h.

net/base/net_util_posix.cc

Index: net/base/net_util_posix.cc
diff --git a/net/base/net_util_posix.cc b/net/base/net_util_posix.cc
index 95b963e7a60d385452c1940dd11b269a005ec562..080f9b0e55a42e8725761f75cf3584d059d062ec 100644
--- a/net/base/net_util_posix.cc
+++ b/net/base/net_util_posix.cc
@@ -85,40 +85,6 @@ void RemovePermanentIPv6AddressesWhereTemporaryExists(
 
 }  // namespace
 
-bool FileURLToFilePath(const GURL& url, base::FilePath* path) {
-  *path = base::FilePath();
-  std::string& file_path_str = const_cast<std::string&>(path->value());
-  file_path_str.clear();
-
-  if (!url.is_valid())
-    return false;
-
-  // Firefox seems to ignore the "host" of a file url if there is one. That is,
-  // file://foo/bar.txt maps to /bar.txt.
-  // TODO(dhg): This should probably take into account UNCs which could
-  // include a hostname other than localhost or blank
-  std::string old_path = url.path();
-
-  if (old_path.empty())
-    return false;
-
-  // GURL stores strings as percent-encoded 8-bit, this will undo if possible.
-  old_path = UnescapeURLComponent(old_path,
-      UnescapeRule::SPACES | UnescapeRule::URL_SPECIAL_CHARS);
-
-  // Collapse multiple path slashes into a single path slash.
-  std::string new_path;
-  do {
-    new_path = old_path;
-    ReplaceSubstringsAfterOffset(&new_path, 0, "//", "/");
-    old_path.swap(new_path);
-  } while (new_path != old_path);
-
-  file_path_str.assign(old_path);
-
-  return !file_path_str.empty();
-}
-
 bool GetNetworkList(NetworkInterfaceList* networks, int policy) {
 #if defined(OS_ANDROID)
   std::string network_list = android::GetNetworkList();