Bug 868572. Move nsIScrollPositionListener file from view/ to layout/. r=mats

--HG--
rename : view/public/nsIScrollPositionListener.h => layout/generic/nsIScrollPositionListener.h

layout/generic/moz.build

@@ -26,6 +26,7 @@ EXPORTS += [
     'nsIPageSequenceFrame.h',
     'nsIScrollableFrame.h',
     'nsIScrollbarOwner.h',
+    'nsIScrollPositionListener.h',
     'nsIStatefulFrame.h',
     'nsObjectFrame.h',
     'nsQueryFrame.h',

layout/generic/nsIScrollPositionListener.h

@@ -10,8 +10,7 @@
 #include "nsCoord.h"
 
 /**
- * Provides a way for a client of an nsIScrollableView to learn about scroll position
- * changes.
+ * Provides a way to learn about scroll position changes of nsIScrollableFrame's.
  */
 class nsIScrollPositionListener {
 public:

view/public/moz.build

@@ -7,7 +7,6 @@
 MODULE = 'view'
 
 EXPORTS += [
-    'nsIScrollPositionListener.h',
     'nsView.h',
     'nsViewManager.h',
 ]