Change NavBar to transparent black
b/30615471

Change-Id: I7885e8a7fd63ee10c9b0107087046730e8acfde9
diff --git a/src/com/android/launcher3/BaseRecyclerViewFastScrollPopup.java b/src/com/android/launcher3/BaseRecyclerViewFastScrollPopup.java
index b4567c5..b9e6277 100644
--- a/src/com/android/launcher3/BaseRecyclerViewFastScrollPopup.java
+++ b/src/com/android/launcher3/BaseRecyclerViewFastScrollPopup.java
@@ -112,7 +112,7 @@
             }
             mBgBounds.top = lastTouchY - (int) (FAST_SCROLL_OVERLAY_Y_OFFSET_FACTOR * bgHeight);
             mBgBounds.top = Math.max(edgePadding,
-                    Math.min(mBgBounds.top, mRv.getHeight() - edgePadding - bgHeight));
+                    Math.min(mBgBounds.top, mRv.getVisibleHeight() - edgePadding - bgHeight));
             mBgBounds.bottom = mBgBounds.top + bgHeight;
 
             // Generate a bitmap for a shadow matching these bounds