UI Resource Manager

cc/resources/ui_resource_client.h

Index: cc/resources/ui_resource_client.h
===================================================================
--- cc/resources/ui_resource_client.h	(revision 0)
+++ cc/resources/ui_resource_client.h	(revision 0)
@@ -0,0 +1,25 @@
+// Copyright 2013 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_RESOURCES_UI_RESOURCE_CLIENT_H_
+#define CC_RESOURCES_UI_RESOURCE_CLIENT_H_
+
+#include "base/callback.h"
+#include "base/memory/ref_counted.h"
+
+namespace cc {
+
+class UIResourceBitmap;
+
+typedef int UIResourceId;
+
+class UIResourceClient {
+ public:
+  virtual scoped_refptr<UIResourceBitmap> Create(bool resource_lost) = 0;

[aelias_OOO_until_Jul13, 2013/07/26 23:35:32]

Could you pass in the UIResourceID as argument here?  It could be useful to some
clients.

I suggest renaming this to "GetBitmap" and add a comment: "GetBitmap() will be
called once soon after resource creation and then will be called afterwards
whenever the GL context is lost, on the same thread that
LayerTreeHost::CreateUIResource was called on.  It is only safe to delete a
UIResourceClient object after DeleteUIResource has been called for all IDs
associated with it.  A valid bitmap always must be returned but it doesn't need
to be the same size or format as the original."

[powei, 2013/07/30 21:47:00]

Done.

+  virtual ~UIResourceClient() {}
+};
+
+}  // namespace cc
+
+#endif  // CC_RESOURCES_UI_RESOURCE_CLIENT_H_