Media Galleries API: hookup the AllGalleries permission and add tests.

chrome/browser/media_gallery/media_file_system_registry.h

Index: chrome/browser/media_gallery/media_file_system_registry.h
diff --git a/chrome/browser/media_gallery/media_file_system_registry.h b/chrome/browser/media_gallery/media_file_system_registry.h
index e87de92bd2dcb3acc82cc04cfd35d615594d797c..e936a8b3e414460fbd88a489cdbd8de6ae35928a 100644
--- a/chrome/browser/media_gallery/media_file_system_registry.h
+++ b/chrome/browser/media_gallery/media_file_system_registry.h
@@ -25,6 +25,10 @@ namespace content {
 class RenderProcessHost;
 }
 
+namespace extensions {
+class Extension;
+}
+
 namespace fileapi {
 class IsolatedContext;
 }
@@ -44,7 +48,8 @@ class MediaFileSystemRegistry
   // Returns the list of media filesystem IDs and paths for a given RPH.
   // Called on the UI thread.
   std::vector<MediaFSIDAndPath> GetMediaFileSystems(
-      const content::RenderProcessHost* rph);
+      const content::RenderProcessHost* rph,
+      const extensions::Extension& extension);
 
   // base::SystemMonitor::DevicesChangedObserver implementation.
   virtual void OnMediaDeviceDetached(const std::string& id) OVERRIDE;