Support choosing multiple files with fileSystem.chooseEntry.

chrome/browser/extensions/api/file_system/file_system_api.h

Index: chrome/browser/extensions/api/file_system/file_system_api.h
diff --git a/chrome/browser/extensions/api/file_system/file_system_api.h b/chrome/browser/extensions/api/file_system/file_system_api.h
index 97b8dd1a8446f121e1734cfa6f4701bf80374f23..88b1139f8b1902d1bd64606adbe479aa4899e7ad 100644
--- a/chrome/browser/extensions/api/file_system/file_system_api.h
+++ b/chrome/browser/extensions/api/file_system/file_system_api.h
@@ -57,27 +57,37 @@ class FileSystemEntryFunction : public AsyncExtensionFunction {
   // This is called when a writable file entry is being returned. The function
   // will ensure the file exists, creating it if necessary, and also check that
   // the file is not a link. If it succeeds it proceeds to
-  // RegisterFileSystemAndSendResponse, otherwise to HandleWritableFileError.
+  // RegisterFileSystemsAndSendResponse, otherwise to HandleWritableFileError.
   void CheckWritableFile(const base::FilePath& path);
+  void CheckWritableFiles(const std::vector<base::FilePath>& path,
+                          bool multiple);
 
   // This will finish the choose file process. This is either called directly
-  // from FileSelected, or from CreateFileIfNecessary. It is called on the UI
+  // from FilesSelected, or from WritableFileCheckHelper. It is called on the UI
   // thread.

[Matt Giuca, 2013/07/19 02:28:11]

Describe |multiple|.

[Sam McNally, 2013/07/19 04:22:14]

Done.

-  void RegisterFileSystemAndSendResponse(const base::FilePath& path,
-                                         EntryType entry_type);
+  void RegisterFileSystemsAndSendResponse(
+      const std::vector<base::FilePath>& path,
+      EntryType entry_type,
+      bool multiple);
 
-  // This will finish the choose file process. This is either called directly
-  // from FileSelected, or from CreateFileIfNecessary. It is called on the UI
-  // thread. |id_override| specifies the id to send in the response instead of
-  // the generated id. This can be useful for creating a file entry with an id
-  // matching another file entry, e.g. for restoreEntry.
+  // This will finish the choose file process. This is called from
+  // FileSystemIsRestorableFunction::RunImpl. |id_override| specifies the id to
+  // send in the response instead of the generated id. This can be useful for
+  // creating a file entry with an id matching another file entry, e.g. for
+  // restoreEntry.
   void RegisterFileSystemAndSendResponseWithIdOverride(
       const base::FilePath& path,
       EntryType entry_type,
       const std::string& id_override);
 
+  base::DictionaryValue* BuildEntryDictWithIdOverride(
+      const base::FilePath& path, EntryType entry_type, const std::string& id);
+
+  base::DictionaryValue* BuildEntryDict(const base::FilePath& path,
+                                        EntryType entry_type);
+
   // called on the UI thread if there is a problem checking a writable file.
-  void HandleWritableFileError();
+  void HandleWritableFileError(const std::string& error);
 };
 
 class FileSystemGetWritableEntryFunction : public FileSystemEntryFunction {
@@ -104,6 +114,8 @@ class FileSystemChooseEntryFunction : public FileSystemEntryFunction {
  public:
   // Allow picker UI to be skipped in testing.
   static void SkipPickerAndAlwaysSelectPathForTest(base::FilePath* path);
+  static void SkipPickerAndAlwaysSelectPathsForTest(
+      std::vector<base::FilePath>* paths);
   static void SkipPickerAndSelectSuggestedPathForTest();
   static void SkipPickerAndAlwaysCancelForTest();
   static void StopSkippingPickerForTest();
@@ -134,14 +146,17 @@ class FileSystemChooseEntryFunction : public FileSystemEntryFunction {
   virtual bool RunImpl() OVERRIDE;
   void ShowPicker(const ui::SelectFileDialog::FileTypeInfo& file_type_info,
                   ui::SelectFileDialog::Type picker_type,
-                  EntryType entry_type);
+                  EntryType entry_type,
+                  bool multiple);
 
  private:
   void SetInitialPathOnFileThread(const base::FilePath& suggested_name,
                                   const base::FilePath& previous_path);
 
-  // FileSelected and FileSelectionCanceled are called by the file picker.
-  void FileSelected(const base::FilePath& path, EntryType entry_type);
+  // FilesSelected and FileSelectionCanceled are called by the file picker.
+  void FilesSelected(const std::vector<base::FilePath>& path,
+                     EntryType entry_type,
+                     bool multiple);
   void FileSelectionCanceled();
 
   base::FilePath initial_path_;