Media Galleries API Picasa: Add file watch to invalidate database data on disk write.

chrome/common/media_galleries/pmp_test_helper.h

 // Copyright 2013 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 CHROME_COMMON_MEDIA_GALLERIES_PMP_TEST_HELPER_H_
 #define CHROME_COMMON_MEDIA_GALLERIES_PMP_TEST_HELPER_H_
 
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/files/scoped_temp_dir.h"
 #include "chrome/common/media_galleries/pmp_constants.h"
 
 namespace base {
 class FilePath;
 }  // namespace base
 
 namespace picasa {
 
 class PmpColumnReader;
 
-// A helper class used for unit tests only
+// A helper class used for tests only
 class PmpTestHelper {
  public:
   explicit PmpTestHelper(const std::string& table_name);
 
   bool Init();
 
+  base::FilePath GetDatabaseDirPath();
   base::FilePath GetTempDirPath();
 
   template<class T>
   bool WriteColumnFileFromVector(const std::string& column_name,
                                  const PmpFieldType field_type,
                                  const std::vector<T>& elements_vector);
 
   static std::vector<char> MakeHeader(const PmpFieldType field_type,
                                        const uint32 row_count);
 
   template<class T>
   static std::vector<char> MakeHeaderAndBody(const PmpFieldType field_type,
                                              const uint32 row_count,
                                              const std::vector<T>& elems);
 
  private:
   std::string table_name_;
-  base::ScopedTempDir temp_dir_;
+  base::ScopedTempDir root_dir_;
 };
 
 }  // namespace picasa
 
 #endif  // CHROME_COMMON_MEDIA_GALLERIES_PMP_TEST_HELPER_H_