Split ClipTransformRecorder into {Clip,Transform}Recorder.

ui/compositor/transform_recorder.h

+// 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 UI_COMPOSITOR_TRANSFORM_RECORDER_H_
+#define UI_COMPOSITOR_TRANSFORM_RECORDER_H_
+
+#include "base/macros.h"
+#include "ui/compositor/compositor_export.h"
+
+namespace cc {
+class DisplayItem;
+class DisplayItemList;
+}
+
+namespace gfx {
+class Transform;
+}
+
+namespace ui {
+class PaintContext;
+
+// A class to provide scoped transforms of painting to a DisplayItemList. The
+// transform provided will be applied to any DisplayItems added to the
+// DisplayItemList while this object is alive. In other words, any nested
+// PaintRecorders or other TransformRecorders will be transformed.
+class COMPOSITOR_EXPORT TransformRecorder {
+ public:
+  explicit TransformRecorder(const PaintContext& context);
+  ~TransformRecorder();
+
+  void Transform(const gfx::Transform& transform);
+
+ private:
+  const PaintContext& context_;
+  bool transformed_;
+
+  DISALLOW_COPY_AND_ASSIGN(TransformRecorder);
+};
+
+}  // namespace ui
+
+#endif  // UI_COMPOSITOR_TRANSFORM_RECORDER_H_