Fail gracefully if profile Temp dir can not be accessed.

chrome/browser/extensions/convert_web_app.cc

Index: chrome/browser/extensions/convert_web_app.cc
diff --git a/chrome/browser/extensions/convert_web_app.cc b/chrome/browser/extensions/convert_web_app.cc
index e1c8c92e406ede2c2d17e0a791d0814ab0e6340b..d410f2a99c63d2e42f1850a26d005bfe7d76036e 100644
--- a/chrome/browser/extensions/convert_web_app.cc
+++ b/chrome/browser/extensions/convert_web_app.cc
@@ -1,4 +1,4 @@
-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// 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.
 
@@ -22,6 +22,7 @@
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/extensions/extension.h"
 #include "chrome/common/extensions/extension_constants.h"
+#include "chrome/common/extensions/extension_file_util.h"
 #include "chrome/common/json_value_serializer.h"
 #include "chrome/common/web_apps.h"
 #include "gfx/codec/png_codec.h"
@@ -84,8 +85,11 @@ std::string ConvertTimeToExtensionVersion(const Time& create_time) {
 scoped_refptr<Extension> ConvertWebAppToExtension(
     const WebApplicationInfo& web_app,
     const Time& create_time) {
-  FilePath user_data_temp_dir;
-  CHECK(PathService::Get(chrome::DIR_USER_DATA_TEMP, &user_data_temp_dir));
+  FilePath user_data_temp_dir = extension_file_util::GetUserDataTempDir();
+  if (user_data_temp_dir.empty()) {
+    LOG(ERROR) << "Could not get path to profile temporary directory.";
+    return NULL;
+  }
 
   ScopedTempDir temp_dir;
   if (!temp_dir.CreateUniqueTempDirUnderPath(user_data_temp_dir)) {