Unpack extensions inside chrome's directory.

base/scoped_temp_dir.cc

 // 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 "base/scoped_temp_dir.h"
 
 #include "base/file_util.h"
 #include "base/logging.h"
 #include "base/string_util.h"
 
 ScopedTempDir::ScopedTempDir() {
 }
 
 ScopedTempDir::~ScopedTempDir() {
   if (!path_.empty() && !file_util::Delete(path_, true))
     LOG(ERROR) << "ScopedTempDir unable to delete " << path_.value();
 }
 
 bool ScopedTempDir::CreateUniqueTempDir() {
   // This "scoped_dir" prefix is only used on Windows and serves as a template
   // for the unique name.
   if (!file_util::CreateNewTempDirectory(FILE_PATH_LITERAL("scoped_dir"),
                                          &path_))
     return false;
 
   return true;
 }
 
+bool ScopedTempDir::CreateUniqueTempDirUnderPath(const FilePath& base_path) {
+  // If |path| does not exist, create it.
+  if (!file_util::CreateDirectory(base_path))
+    return false;
+
+  // Create a new, uniquly named directory under |base_path|.
+  if (!file_util::CreateTemporaryDirInDir(
+          base_path,
+          FILE_PATH_LITERAL("scoped_dir_"),
+          &path_)) {
+    return false;
+  }
+  return true;
+}
+
 bool ScopedTempDir::Set(const FilePath& path) {
   DCHECK(path_.empty());
   if (!file_util::DirectoryExists(path) &&
       !file_util::CreateDirectory(path)) {
     return false;
   }
   path_ = path;
   return true;
 }
 
 FilePath ScopedTempDir::Take() {
   FilePath ret = path_;
   path_ = FilePath();
   return ret;
 }
 
 bool ScopedTempDir::IsValid() const {
   return !path_.empty() && file_util::DirectoryExists(path_);
 }