mac: Remove IsOSLion().

ui/app_list/cocoa/scroll_view_with_no_scrollbars.mm

Index: ui/app_list/cocoa/scroll_view_with_no_scrollbars.mm
diff --git a/ui/app_list/cocoa/scroll_view_with_no_scrollbars.mm b/ui/app_list/cocoa/scroll_view_with_no_scrollbars.mm
index b855ee058147238bed6038709699dd7613cdb5a7..d4cff30a462a47bfd98b5e282f382cb42a2d5f97 100644
--- a/ui/app_list/cocoa/scroll_view_with_no_scrollbars.mm
+++ b/ui/app_list/cocoa/scroll_view_with_no_scrollbars.mm
@@ -4,7 +4,6 @@
 
 #include "ui/app_list/cocoa/scroll_view_with_no_scrollbars.h"
 
-#include "base/mac/mac_util.h"
 #include "base/mac/scoped_cftyperef.h"
 #include "base/mac/scoped_nsobject.h"
 #include "base/mac/sdk_forward_declarations.h"
@@ -29,7 +28,7 @@
 
 - (id)initWithFrame:(NSRect)frame {
   if ((self = [super initWithFrame:frame])) {
-    [self setHasHorizontalScroller:base::mac::IsOSLionOrLater()];
+    [self setHasHorizontalScroller:YES];
     NSRect horizontalScrollerRect = [self bounds];
     horizontalScrollerRect.size.height = 0;
     base::scoped_nsobject<InvisibleScroller> horizontalScroller(
@@ -39,12 +38,6 @@
   return self;
 }
 
-- (void)endGestureWithEvent:(NSEvent*)event {
-  [super endGestureWithEvent:event];
-  if (!base::mac::IsOSLionOrLater())
-    [delegate_ userScrolling:NO];
-}
-
 - (void)scrollWheel:(NSEvent*)event {
   if ([event subtype] == NSMouseEventSubtype) {
     // Since the scroll view has no vertical scroller, regular up and down mouse