Teach SkyView path to draw a circle

sky/engine/public/sky/sky_view_client.h

Index: sky/engine/public/sky/sky_view_client.h
diff --git a/sky/engine/public/sky/sky_view_client.h b/sky/engine/public/sky/sky_view_client.h
new file mode 100644
index 0000000000000000000000000000000000000000..16f9552b4d4a615f84ec5ae2159a694c814d93a3
--- /dev/null
+++ b/sky/engine/public/sky/sky_view_client.h
@@ -0,0 +1,20 @@
+// 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 SKY_ENGINE_PUBLIC_SKY_SKY_VIEW_CLIENT_H_
+#define SKY_ENGINE_PUBLIC_SKY_SKY_VIEW_CLIENT_H_
+
+namespace blink {
+
+class SkyViewClient {
+ public:
+  virtual void SchedulePaint() = 0;
+
+ protected:
+  virtual ~SkyViewClient();
+};
+
+} // namespace blink
+
+#endif  // SKY_ENGINE_PUBLIC_SKY_SKY_VIEW_CLIENT_H_