Media Galleries: Add chrome.mediaGalleries.addUserSelectedFolder().

chrome/browser/extensions/api/media_galleries/media_galleries_api.h

Index: chrome/browser/extensions/api/media_galleries/media_galleries_api.h
===================================================================
--- chrome/browser/extensions/api/media_galleries/media_galleries_api.h	(revision 243958)
+++ chrome/browser/extensions/api/media_galleries/media_galleries_api.h	(working copy)
@@ -8,6 +8,7 @@
 #ifndef CHROME_BROWSER_EXTENSIONS_API_MEDIA_GALLERIES_MEDIA_GALLERIES_API_H_
 #define CHROME_BROWSER_EXTENSIONS_API_MEDIA_GALLERIES_MEDIA_GALLERIES_API_H_
 
+#include <string>
 #include <vector>
 
 #include "base/memory/scoped_ptr.h"
@@ -78,6 +79,39 @@
                       const MediaStorageUtil::DeviceIdSet* available_devices);
 };
 
+class MediaGalleriesAddUserSelectedFolderFunction
+    : public ChromeAsyncExtensionFunction {
+ public:
+  DECLARE_EXTENSION_FUNCTION("mediaGalleries.addUserSelectedFolder",
+                             MEDIAGALLERIES_ADDUSERSELECTEDFOLDER)
+
+ protected:
+  virtual ~MediaGalleriesAddUserSelectedFolderFunction();
+  virtual bool RunImpl() OVERRIDE;
+
+ private:
+  // Bottom half for RunImpl, invoked after the preferences is initialized.
+  void OnPreferencesInit();
+
+  // Callback for the directory prompt request, with the input from the user.
+  // If |selected_directory| is empty, then the user canceled.
+  // Either handle the user canceled case or add the selected gallery.
+  void OnDirectorySelected(const base::FilePath& selected_directory);
+
+  // Callback for the directory prompt request. |pref_id| is for the gallery
+  // the user just added. |filesystems| is the entire list of file systems.
+  // The fsid for the file system that corresponds to |pref_id| will be
+  // appended to the list of file systems returned to the caller. The
+  // Javascript binding for this API will interpret the list appropriately.
+  void ReturnGalleriesAndId(
+      MediaGalleryPrefId pref_id,
+      const std::vector<MediaFileSystemInfo>& filesystems);
+
+  // A helper method that calls
+  // MediaFileSystemRegistry::GetMediaFileSystemsForExtension().
+  void GetMediaFileSystemsForExtension(const MediaFileSystemsCallback& cb);
+};
+
 class MediaGalleriesGetMetadataFunction : public ChromeAsyncExtensionFunction {
  public:
   DECLARE_EXTENSION_FUNCTION("mediaGalleries.getMetadata",