Make cc/paint have concrete types

cc/paint/paint_recorder.cc

Index: cc/paint/paint_recorder.cc
diff --git a/cc/paint/paint_recorder.cc b/cc/paint/paint_recorder.cc
new file mode 100644
index 0000000000000000000000000000000000000000..672f0712725d4f1c20b56631d66061c737455c40
--- /dev/null
+++ b/cc/paint/paint_recorder.cc
@@ -0,0 +1,12 @@
+// Copyright 2017 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.
+
+#include "cc/paint/paint_recorder.h"
+
+namespace cc {
+
+PaintRecorder::PaintRecorder() = default;
+PaintRecorder::~PaintRecorder() = default;
+
+}  // namespace cc