Add |GraphicsLayerDebugInfo::getAnnotatedInvalidationRects|

public/platform/WebInvalidationDebugAnnotations.h

+// Copyright 2014 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 WebInvalidationDebugAnnotations_h
+#define WebInvalidationDebugAnnotations_h
+
+#include "public/platform/WebFloatRect.h"
+
+namespace blink {
+
+enum WebInvalidationDebugAnnotations {
+    WebInvalidationDebugAnnotationsNone = 0,
+    WebInvalidationDebugAnnotationsFirstPaint = 1 << 0,
+    WebInvalidationDebugAnnotationsScrollbar = 1 << 1,
+};
+
+struct WebAnnotatedInvalidationRect {
+    WebFloatRect rect;
+    WebInvalidationDebugAnnotations annotations;
+};
+
+} // namespace blink
+
+#endif // WebInvalidationDebugAnnotations_h