Reland this change. Registers paths for the testing exe, too....

app/app_paths.cc

Index: app/app_paths.cc
===================================================================
--- app/app_paths.cc	(revision 0)
+++ app/app_paths.cc	(revision 0)
@@ -0,0 +1,70 @@
+// Copyright (c) 2009 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 "app/app_paths.h"
+
+#include "base/command_line.h"
+#include "base/file_path.h"
+#include "base/file_util.h"
+#include "base/path_service.h"
+
+namespace app {
+
+bool PathProvider(int key, FilePath* result) {
+  // Assume that we will not need to create the directory if it does not exist.
+  // This flag can be set to true for the cases where we want to create it.
+  bool create_dir = false;
+
+  FilePath cur;
+  switch (key) {
+    case app::DIR_THEMES:
+      if (!PathService::Get(base::DIR_MODULE, &cur))
+        return false;
+      cur = cur.Append(FILE_PATH_LITERAL("themes"));
+      create_dir = true;
+      break;
+    case app::DIR_LOCALES:
+      if (!PathService::Get(base::DIR_MODULE, &cur))
+        return false;
+#if defined(OS_MACOSX)
+      // On Mac, locale files are in Contents/Resources, a sibling of the
+      // App dir.
+      cur = cur.DirName();
+      cur = cur.Append(FILE_PATH_LITERAL("Resources"));
+#else
+      cur = cur.Append(FILE_PATH_LITERAL("locales"));
+#endif
+      create_dir = true;
+      break;
+    // The following are only valid in the development environment, and
+    // will fail if executed from an installed executable (because the
+    // generated path won't exist).
+    case app::DIR_TEST_DATA:
+      if (!PathService::Get(base::DIR_SOURCE_ROOT, &cur))
+        return false;
+      cur = cur.Append(FILE_PATH_LITERAL("app"));
+      cur = cur.Append(FILE_PATH_LITERAL("test"));
+      cur = cur.Append(FILE_PATH_LITERAL("data"));
+      if (!file_util::PathExists(cur))  // we don't want to create this
+        return false;
+      break;
+    default:
+      return false;
+  }
+
+  if (create_dir && !file_util::PathExists(cur) &&
+      !file_util::CreateDirectory(cur))
+    return false;
+
+  *result = cur;
+  return true;
+}
+
+// This cannot be done as a static initializer sadly since Visual Studio will
+// eliminate this object file if there is no direct entry point into it.
+void RegisterPathProvider() {
+  PathService::RegisterProvider(PathProvider, PATH_START, PATH_END);
+}
+
+}  // namespace app