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

chrome/common/extensions/api/media_galleries.idl

Index: chrome/common/extensions/api/media_galleries.idl
===================================================================
--- chrome/common/extensions/api/media_galleries.idl	(revision 237402)
+++ chrome/common/extensions/api/media_galleries.idl	(working copy)
@@ -17,6 +17,8 @@
   };
 
   [inline_doc] dictionary MediaFileSystemsDetails {
+    // [Deprecated] use manageMediaLocations and ManageRequestDetails instead.
+    //
     // Whether to prompt the user for permission to additional media galleries
     // before returning the permitted set. Default is silent.  If the value
     // 'yes' is passed, or if the application has not been granted access to
@@ -26,8 +28,33 @@
   };
 
   callback MediaFileSystemsCallback =
-      void ([instanceOf=DOMFileSystem] optional object[] mediaFileSystems);
+      void ([instanceOf=DOMFileSystem] object[] mediaFileSystems);
 
+  [inline_doc] enum ManageRequestType {
+    // Ask the user to manage permitted media galleries.
+    manage,
+
+    // Present a directory picker to the user and add access to the directory
+    // the user selects.
+    directory_prompt
+  };
+
+  [inline_doc] dictionary ManageRequestDetails {
+    // Specify the management action to take.
+    ManageRequestType type;
+  };
+
+  [inline_doc] dictionary ManageRequestResults {
+    // The returned file systems. Null on failure.
+    // For the "manage" request, the returned array contains the user-permitted
+    // galleries. The array may be empty.
+    // For the "directory_prompt" request, the returned array contains the
+    // user-selected gallery. If the user cancels, the returned array is empty.
+    [instanceOf=DOMFileSystem] object[] media_file_systems;
+  };
+
+  callback ManageMediaLocationsCallback = void (ManageRequestResults results);
+
   [inline_doc] dictionary MediaFileSystemMetadata {
     // The name of the file system.
     DOMString name;
@@ -59,6 +86,12 @@
     static void getMediaFileSystems(optional MediaFileSystemsDetails details,
                                     MediaFileSystemsCallback callback);
 
+    // Manage existing media location or request access to new media locations.
+    // In all cases the user will be prompted. The callback will be called
+    // when the user is done and will include all media galleries.
+    static void manageMediaLocations(ManageRequestDetails details,
+                                     ManageMediaLocationsCallback callback);
+
     // Get metadata about a specific media file system.
     [nocompile] static MediaFileSystemMetadata getMediaFileSystemMetadata(
         [instanceOf=DOMFileSystem] object mediaFileSystem);