diff -r 000000000000 -r 6474c204b198 ipc/chromium/src/base/path_service.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ipc/chromium/src/base/path_service.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,80 @@
+// 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.
+
+#ifndef BASE_PATH_SERVICE_H__
+#define BASE_PATH_SERVICE_H__
+
+#include "build/build_config.h"
+#ifdef OS_WIN
+// TODO(erikkay): this should be removable, but because SetCurrentDirectory
+// is the name of a Windows function, it gets macro-ized to SetCurrentDirectoryW
+// by windows.h, which leads to a different name in the header vs. the impl.
+// Even if we could fix that, it would still hose all callers of the function.
+// The right thing is likely to rename.
+#include <windows.h>
+#endif
+
+#include <string>
+
+#include "base/base_paths.h"
+
+class FilePath;
+
+// The path service is a global table mapping keys to file system paths.  It is
+// OK to use this service from multiple threads.
+//
+class PathService {
+ public:
+  // Retrieves a path to a special directory or file and places it into the
+  // string pointed to by 'path'. If you ask for a directory it is guaranteed
+  // to NOT have a path separator at the end. For example, "c:\windows\temp"
+  // Directories are also guaranteed to exist when this function succeeds.
+  //
+  // Returns true if the directory or file was successfully retrieved. On
+  // failure, 'path' will not be changed.
+  static bool Get(int key, FilePath* path);
+  // This version, producing a wstring, is deprecated and only kept around
+  // until we can fix all callers.
+  static bool Get(int key, std::wstring* path);
+
+  // Overrides the path to a special directory or file.  This cannot be used to
+  // change the value of DIR_CURRENT, but that should be obvious.  Also, if the
+  // path specifies a directory that does not exist, the directory will be
+  // created by this method.  This method returns true if successful.
+  //
+  // If the given path is relative, then it will be resolved against
+  // DIR_CURRENT.
+  //
+  // WARNING: Consumers of PathService::Get may expect paths to be constant
+  // over the lifetime of the app, so this method should be used with caution.
+  static bool Override(int key, const std::wstring& path);
+
+  // Return whether a path was overridden.
+  static bool IsOverridden(int key);
+
+  // Sets the current directory.
+  static bool SetCurrentDirectory(const std::wstring& current_directory);
+
+  // To extend the set of supported keys, you can register a path provider,
+  // which is just a function mirroring PathService::Get.  The ProviderFunc
+  // returns false if it cannot provide a non-empty path for the given key.
+  // Otherwise, true is returned.
+  //
+  // WARNING: This function could be called on any thread from which the
+  // PathService is used, so the ProviderFunc MUST BE THREADSAFE.
+  //
+  typedef bool (*ProviderFunc)(int, FilePath*);
+
+  // Call to register a path provider.  You must specify the range "[key_start,
+  // key_end)" of supported path keys.
+  static void RegisterProvider(ProviderFunc provider,
+                               int key_start,
+                               int key_end);
+ private:
+  static bool GetFromCache(int key, FilePath* path);
+  static void AddToCache(int key, const FilePath& path);
+
+};
+
+#endif // BASE_PATH_SERVICE_H__