[Media Galleries] Lazily initialize the storage monitor.

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 528994d56984ff9cae56ede346f9176fa31e2d40..5e53984e8b3f68f75787a47443142a23c9f14bc8 100644
--- a/chrome/browser/extensions/api/media_galleries/media_galleries_api.h
+++ b/chrome/browser/extensions/api/media_galleries/media_galleries_api.h
@@ -12,6 +12,9 @@
 
 #include "chrome/browser/extensions/extension_function.h"
 #include "chrome/browser/media_galleries/media_file_system_registry.h"
+#include "chrome/common/extensions/api/media_galleries.h"
+
+namespace MediaGalleries = extensions::api::media_galleries;
 
 namespace extensions {
 
@@ -26,6 +29,10 @@ class MediaGalleriesGetMediaFileSystemsFunction
   virtual bool RunImpl() OVERRIDE;
 
  private:
+  // Bottom half for RunImpl, invoked after the storage monitor is initialized.

[vandebo (ex-Chrome), 2013/05/31 18:05:03]

nit: Since RunImpl was already async and posts tasks with callbacks, to call
this the bottom half is not quite right.  Not sure what the right comment is
though.

[Greg Billock, 2013/06/01 01:48:46]

Hmm. I don't think of bottom half being that specific.  And besides, RunImpl is
getting called synchronously.

+  void OnStorageMonitorInit(
+    MediaGalleries::GetMediaFileSystemsInteractivity interactive);
+
   // Always show the dialog.
   void AlwaysShowDialog(
       const std::vector<chrome::MediaFileSystemInfo>& filesystems);