gdata: Convert public synchronous functions in GDataFileSystem to asynchronous.

chrome/browser/chromeos/gdata/gdata_util.h

 // Copyright (c) 2012 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_BROWSER_CHROMEOS_GDATA_GDATA_UTIL_H_
 #define CHROME_BROWSER_CHROMEOS_GDATA_GDATA_UTIL_H_
 #pragma once
 
 #include <string>
 #include <vector>
 
+#include "base/bind.h"
+#include "base/memory/scoped_ptr.h"
 #include "googleurl/src/gurl.h"
 
 class FilePath;
 class Profile;
 
 namespace gdata {
 namespace util {
 
 // Search path is a path used to display gdata content search results.
 // All results are displayed under virtual directory "drive/.search", in which
@@ skipping 48 matching lines @@
 // If the path is not search path, the behaviour is not defined.
 bool ParseSearchFileName(const std::string& search_file_name,
                          std::string* resource_id,
                          std::string* original_file_name);
 
 // Extracts the GData path from the given path located under the GData mount
 // point. Returns an empty path if |path| is not under the GData mount point.
 // Examples: ExtractGDatPath("/special/drive/foo.txt") => "drive/foo.txt"
 FilePath ExtractGDataPath(const FilePath& path);
 
-// Returns vector of all possible cache paths for a given path on gdata mount
-// point.
+// Inserts all possible cache paths for a given vector of paths on gdata mount
+// point into the output vector |cache_paths|, and then invokes callback.
+// Caller must ensure that |cache_paths| lives until the callback is invoked.
 void InsertGDataCachePathsPermissions(
     Profile* profile_,
-    const FilePath& gdata_path,
-    std::vector<std::pair<FilePath, int> >* cache_paths);
+    scoped_ptr<std::vector<FilePath> > gdata_paths,
+    std::vector<std::pair<FilePath, int> >* cache_paths,
+    const base::Closure& callback);
 
 // Returns true if gdata is currently active with the specified profile.
 bool IsGDataAvailable(Profile* profile);
 
 // Escapes a file name in GData cache.
 // Replaces percent ('%'), period ('.') and slash ('/') with %XX (hex)
 std::string EscapeCacheFileName(const std::string& filename);
 
 // Unescapes a file path in GData cache.
 // This is the inverse of EscapeCacheFileName.
@@ skipping 10 matching lines @@
 // Example: path="/user/GCache/v1/persistent/pdf:a1b2.01234567.mounted" =>
 //          resource_id="pdf:a1b2", md5="01234567", extra_extension="mounted".
 void ParseCacheFilePath(const FilePath& path,
                         std::string* resource_id,
                         std::string* md5,
                         std::string* extra_extension);
 }  // namespace util
 }  // namespace gdata
 
 #endif  // CHROME_BROWSER_CHROMEOS_GDATA_GDATA_UTIL_H_