cc/blimp: Set up the framework for state serialization.

cc/blimp/layer_factory.h

Index: cc/blimp/layer_factory.h
diff --git a/cc/blimp/layer_factory.h b/cc/blimp/layer_factory.h
new file mode 100644
index 0000000000000000000000000000000000000000..c8ff5dd727c678e838eca5145fe5a4b24421abf9
--- /dev/null
+++ b/cc/blimp/layer_factory.h
@@ -0,0 +1,25 @@
+// Copyright 2016 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 CC_BLIMP_LAYER_FACTORY_H_
+#define CC_BLIMP_LAYER_FACTORY_H_
+
+#include "base/macros.h"
+#include "base/memory/ref_counted.h"
+
+namespace cc {
+class Layer;
+
+// Used to allow tests to inject the Layer created by the
+// CompositorStateDeserializer on the client.
+class LayerFactory {
+ public:
+  virtual ~LayerFactory() {}
+
+  virtual scoped_refptr<Layer> CreateLayer(int engine_layer_id) = 0;

[ajuma, 2016/10/04 15:45:10]

When you start to expand test coverage, you'll need to add support for other
subclasses of Layer (like FakePictureLayer).

[Khushal, 2016/10/04 18:34:47]

Sounds good. For each of them we can add methods to create layers with the id
specified.

+};
+
+}  // namespace cc
+
+#endif  // CC_BLIMP_LAYER_FACTORY_H_