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

chrome/browser/ui/cocoa/circular_activity_indicator_view.h

Index: chrome/browser/ui/cocoa/circular_activity_indicator_view.h
diff --git a/chrome/browser/ui/cocoa/circular_activity_indicator_view.h b/chrome/browser/ui/cocoa/circular_activity_indicator_view.h
new file mode 100644
index 0000000000000000000000000000000000000000..f580766199a0f7f32934391d7001dbb2fa7e4453
--- /dev/null
+++ b/chrome/browser/ui/cocoa/circular_activity_indicator_view.h
@@ -0,0 +1,21 @@
+// 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_CIRCULAR_ACTIVITY_INDICATOR_VIEW_H_
+#define CHROME_BROWSER_UI_COCOA_CIRCULAR_ACTIVITY_INDICATOR_VIEW_H_
+
+#import <Cocoa/Cocoa.h>
+
+#include "base/mac/scoped_nsobject.h"
+
+@class CAAnimationGroup;
+@class CAShapeLayer;
+
+@interface CircularActivityIndicatorView : NSView {
+  bool is_animating_;

[groby-ooo-7-16, 2015/03/31 23:07:01]

nit: Mark @private, please.

[shrike, 2015/04/01 15:30:45]

Done.

+}
+
+@end
+
+#endif  // CHROME_BROWSER_UI_COCOA_CIRCULAR_ACTIVITY_INDICATOR_VIEW_H_