Fix nits.

chrome/browser/ui/cocoa/spinner_view.h

Index: chrome/browser/ui/cocoa/spinner_view.h
diff --git a/chrome/browser/ui/cocoa/spinner_view.h b/chrome/browser/ui/cocoa/spinner_view.h
index 44a003cd8775117d0160d582213d7d730c0a3762..e370c556e8e693d0703a35e4b4e95ee58178c985 100644
--- a/chrome/browser/ui/cocoa/spinner_view.h
+++ b/chrome/browser/ui/cocoa/spinner_view.h
@@ -7,14 +7,15 @@
 
 #import <Cocoa/Cocoa.h>
 
-#include "base/mac/scoped_nsobject.h"
-
-@class CAAnimationGroup;
-@class CAShapeLayer;
+#import "base/mac/scoped_nsobject.h"
 
+// A view that displays a Material Design Circular Activity Indicator (aka a
+// "spinner") for Mac Chrome. To use, create a SpinnerView of the desired size
+// and add to a view hierarchy. SpinnerView uses Core Animation to achieve GPU-
+// accelerated animation and smooth scaling to any size.
 @interface SpinnerView : NSView {
-  @private
-  bool is_animating_;
+ @private
+  bool isAnimating_;
 }
 
 @end