Media galleries: configuration dialog controller and GTK impl.

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

Index: chrome/browser/extensions/api/media_galleries/media_galleries_api.h
diff --git a/chrome/browser/extensions/api/media_galleries/media_galleries_api.h b/chrome/browser/extensions/api/media_galleries/media_galleries_api.h
index 45b7e6e1627df8f3180d8edae648c4a63c0c1094..6aa592191c3520dce8a15968f0bdf39b679d5b93 100644
--- a/chrome/browser/extensions/api/media_galleries/media_galleries_api.h
+++ b/chrome/browser/extensions/api/media_galleries/media_galleries_api.h
@@ -9,10 +9,13 @@
 #define CHROME_BROWSER_EXTENSIONS_API_MEDIA_GALLERIES_MEDIA_GALLERIES_API_H_
 
 #include "chrome/browser/extensions/extension_function.h"
+#include "chrome/browser/media_gallery/media_galleries_dialog_controller.h"
 
 namespace extensions {
 
-class MediaGalleriesGetMediaFileSystemsFunction : public SyncExtensionFunction {
+class MediaGalleriesGetMediaFileSystemsFunction
+    : public AsyncExtensionFunction,
+      public chrome::MediaGalleriesDialogDelegate {
  public:
   DECLARE_EXTENSION_FUNCTION_NAME(
       "experimental.mediaGalleries.getMediaFileSystems")
@@ -20,6 +23,16 @@ class MediaGalleriesGetMediaFileSystemsFunction : public SyncExtensionFunction {
  protected:
   virtual ~MediaGalleriesGetMediaFileSystemsFunction();
   virtual bool RunImpl() OVERRIDE;
+
+ private:
+  // Grabs the galleries from the preferences system and returns them.
+  void ReturnGalleries();
+
+  // Shows the configuration dialog to edit gallery preferences.
+  void ShowDialog();
+
+  // MediaGalleriesDialogDelegate implementation:
+  virtual void MediaGalleriesDialogFinished() OVERRIDE;
 };
 
 class MediaGalleriesAssembleMediaFileFunction : public SyncExtensionFunction {