Add a Material Design Circular Activity Indicator (Spinner) view for Mac.

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
new file mode 100644
index 0000000000000000000000000000000000000000..44a003cd8775117d0160d582213d7d730c0a3762
--- /dev/null
+++ b/chrome/browser/ui/cocoa/spinner_view.h
@@ -0,0 +1,22 @@
+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_BROWSER_UI_COCOA_SPINNER_VIEW_H_
+#define CHROME_BROWSER_UI_COCOA_SPINNER_VIEW_H_
+
+#import <Cocoa/Cocoa.h>
+
+#include "base/mac/scoped_nsobject.h"

[Robert Sesek, 2015/04/01 16:25:01]

#import over #include

[shrike, 2015/04/01 20:55:54]

Done.

+
+@class CAAnimationGroup;

[Robert Sesek, 2015/04/01 16:25:01]

These forward declares are unnecessary.

[shrike, 2015/04/01 20:55:54]

Remnants of a previous change. Done.

+@class CAShapeLayer;
+
+@interface SpinnerView : NSView {
+  @private

[Robert Sesek, 2015/04/01 16:25:01]

nit: only indent @private 1 space

http://google-styleguide.googlecode.com/svn/trunk/objcguide.xml?showone=Insta...

[shrike, 2015/04/01 20:55:54]

OK.

+  bool is_animating_;

[Robert Sesek, 2015/04/01 16:25:01]

naming: isAnimating_

The rule is if writing an ObjC class, use camelCase, otherwise use under_scores.

[shrike, 2015/04/01 20:55:53]

OK.

+}
+
+@end
+
+#endif  // CHROME_BROWSER_UI_COCOA_SPINNER_VIEW_H_