Animated Rotation

views/animation/paint_lock.h

Index: views/animation/paint_lock.h
diff --git a/views/animation/paint_lock.h b/views/animation/paint_lock.h
new file mode 100644
index 0000000000000000000000000000000000000000..a3463a8afe254f6f99cf3deafe4a6c575b5a9b63
--- /dev/null
+++ b/views/animation/paint_lock.h
@@ -0,0 +1,30 @@
+// Copyright (c) 2011 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 VIEWS_ANIMATION_PAINT_LOCK_H_
+#define VIEWS_ANIMATION_PAINT_LOCK_H_
+#pragma once
+
+namespace views {
+
+class View;
+
+// Instances of PaintLock can be created to disable painting of the view
+// (compositing is not disabled). When the class is destroyed, painting is
+// re-enabled. This can be useful during operations like animations, that are
+// sensitive to costly paints, and during which only composting, not painting,
+// is required.
+class PaintLock {
+ public:
+  // The paint lock does not own the view. It is an error for the view to be
+  // destroed before the lock.

[sky, 2011/08/25 21:10:12]

destroed -> destroyed.

+  PaintLock(View* view);
+  ~PaintLock();
+ private:

[sky, 2011/08/25 21:10:12]

nit: newline between 23 and 24.

+  View* view_;
+};

[sky, 2011/08/25 21:10:12]

DISALLOW_COPY_AND_ASSIGN.

+
+} // namespace views
+
+#endif // VIEWS_ANIMATION_PAINT_LOCK_H_