Add support for directory access to the file system API.

apps/saved_files_service.cc

Index: apps/saved_files_service.cc
diff --git a/apps/saved_files_service.cc b/apps/saved_files_service.cc
index aa64af90d62fbdbdea974741708d4477a5122829..f832ffe60c2246dfcead8afaed264cce8e9daa1b 100644
--- a/apps/saved_files_service.cc
+++ b/apps/saved_files_service.cc
@@ -36,6 +36,9 @@ const char kFileEntries[] = "file_entries";
 // The path to a file entry that the app had permission to access.
 const char kFileEntryPath[] = "path";
 
+// Whether or not the the entry refers to a directory.
+const char kFileEntryIsDirectory[] = "is_directory";
+
 // The sequence number in the LRU of the file entry.
 const char kFileEntrySequenceNumber[] = "sequence_number";
 
@@ -59,6 +62,7 @@ void AddSavedFileEntry(ExtensionPrefs* prefs,
 
   DictionaryValue* file_entry_dict = new DictionaryValue();
   file_entry_dict->Set(kFileEntryPath, CreateFilePathValue(file_entry.path));
+  file_entry_dict->SetBoolean(kFileEntryIsDirectory, file_entry.is_directory);
   file_entry_dict->SetInteger(kFileEntrySequenceNumber,
                               file_entry.sequence_number);
   file_entries->SetWithoutPathExpansion(file_entry.id, file_entry_dict);
@@ -118,25 +122,30 @@ std::vector<SavedFileEntry> GetSavedFileEntries(
     base::FilePath file_path;
     if (!GetValueAsFilePath(*path_value, &file_path))
       continue;
+    bool is_directory = false;
+    file_entry->GetBoolean(kFileEntryIsDirectory, &is_directory);
     int sequence_number = 0;
     if (!file_entry->GetInteger(kFileEntrySequenceNumber, &sequence_number))
       continue;
     if (!sequence_number)
       continue;
-    result.push_back(SavedFileEntry(it.key(), file_path, sequence_number));
+    result.push_back(
+        SavedFileEntry(it.key(), file_path, is_directory, sequence_number));
   }
   return result;
 }
 
 }  // namespace
 
-SavedFileEntry::SavedFileEntry() : sequence_number(0) {}
+SavedFileEntry::SavedFileEntry() : is_directory(false), sequence_number(0) {}
 
 SavedFileEntry::SavedFileEntry(const std::string& id,
                                const base::FilePath& path,
+                               bool is_directory,
                                int sequence_number)
     : id(id),
       path(path),
+      is_directory(is_directory),
       sequence_number(sequence_number) {}
 
 class SavedFilesService::SavedFiles {
@@ -145,7 +154,8 @@ class SavedFilesService::SavedFiles {
   ~SavedFiles();
 
   void RegisterFileEntry(const std::string& id,
-                         const base::FilePath& file_path);
+                         const base::FilePath& file_path,
+                         bool is_directory);
   void EnqueueFileEntry(const std::string& id);
   bool IsRegistered(const std::string& id) const;
   const SavedFileEntry* GetFileEntry(const std::string& id) const;
@@ -219,8 +229,9 @@ void SavedFilesService::Observe(int type,
 
 void SavedFilesService::RegisterFileEntry(const std::string& extension_id,
                                           const std::string& id,
-                                          const base::FilePath& file_path) {
-  GetOrInsert(extension_id)->RegisterFileEntry(id, file_path);
+                                          const base::FilePath& file_path,
+                                          bool is_directory) {
+  GetOrInsert(extension_id)->RegisterFileEntry(id, file_path, is_directory);
 }
 
 void SavedFilesService::EnqueueFileEntry(const std::string& extension_id,
@@ -303,12 +314,13 @@ SavedFilesService::SavedFiles::~SavedFiles() {}
 
 void SavedFilesService::SavedFiles::RegisterFileEntry(
     const std::string& id,
-    const base::FilePath& file_path) {
+    const base::FilePath& file_path,
+    bool is_directory) {
   if (ContainsKey(registered_file_entries_, id))
     return;
 
   registered_file_entries_.insert(
-      std::make_pair(id, new SavedFileEntry(id, file_path, 0)));
+      std::make_pair(id, new SavedFileEntry(id, file_path, is_directory, 0)));
 }
 
 void SavedFilesService::SavedFiles::EnqueueFileEntry(const std::string& id) {