mac: Remove IsOSLion().

chrome/browser/ui/cocoa/spinner_view.mm

Index: chrome/browser/ui/cocoa/spinner_view.mm
diff --git a/chrome/browser/ui/cocoa/spinner_view.mm b/chrome/browser/ui/cocoa/spinner_view.mm
index ee52d1956bbb684edaa582a40b281764dbafed32..4729b1f1b28af386b46bb3d9a59974810d8ec9f5 100644
--- a/chrome/browser/ui/cocoa/spinner_view.mm
+++ b/chrome/browser/ui/cocoa/spinner_view.mm
@@ -6,7 +6,6 @@
 
 #import <QuartzCore/QuartzCore.h>
 
-#include "base/mac/mac_util.h"
 #include "base/mac/sdk_forward_declarations.h"
 #include "base/mac/scoped_cftyperef.h"
 #include "skia/ext/skia_utils_mac.h"
@@ -178,10 +177,8 @@ NSString* const kRotationAnimationName = @"RotationAnimationName";
   // Make sure |shapeLayer_|'s content scale factor matches the window's
   // backing depth (e.g. it's 2.0 on Retina Macs). Don't worry about adjusting
   // any other layers because |shapeLayer_| is the only one displaying content.
-  if (base::mac::IsOSLionOrLater()) {
-    CGFloat backingScaleFactor = [[self window] backingScaleFactor];
-    [shapeLayer_ setContentsScale:backingScaleFactor];
-  }
+  CGFloat backingScaleFactor = [[self window] backingScaleFactor];
+  [shapeLayer_ setContentsScale:backingScaleFactor];
 
   // Create the first half of the arc animation, where it grows from a short
   // block to its full length.