Revert "Delete CC."

cc/resources/texture_mailbox_deleter.h

+// 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_TEXTURE_MAILBOX_DELETER_H_
+#define CC_RESOURCES_TEXTURE_MAILBOX_DELETER_H_
+
+#include "base/memory/weak_ptr.h"
+#include "cc/base/scoped_ptr_vector.h"
+
+namespace base {
+class SingleThreadTaskRunner;
+}
+
+namespace cc {
+class ContextProvider;
+class SingleReleaseCallback;
+
+class TextureMailboxDeleter {
+ public:
+  explicit TextureMailboxDeleter(
+      const scoped_refptr<base::SingleThreadTaskRunner>& task_runner);
+  ~TextureMailboxDeleter();
+
+  // Returns a Callback that can be used as the ReleaseCallback for a
+  // TextureMailbox attached to the |texture_id|. The ReleaseCallback can
+  // be passed to other threads and will destroy the texture, once it is
+  // run, on the impl thread. If the TextureMailboxDeleter is destroyed
+  // due to the compositor shutting down, then the ReleaseCallback will
+  // become a no-op and the texture will be deleted immediately on the
+  // impl thread, along with dropping the reference to the ContextProvider.
+  scoped_ptr<SingleReleaseCallback> GetReleaseCallback(
+      const scoped_refptr<ContextProvider>& context_provider,
+      unsigned texture_id);
+
+ private:
+  // Runs the |impl_callback| to delete the texture and removes the callback
+  // from the |impl_callbacks_| list.
+  void RunDeleteTextureOnImplThread(SingleReleaseCallback* impl_callback,
+                                    uint32 sync_point,
+                                    bool is_lost);
+
+  scoped_refptr<base::SingleThreadTaskRunner> impl_task_runner_;
+  ScopedPtrVector<SingleReleaseCallback> impl_callbacks_;
+  base::WeakPtrFactory<TextureMailboxDeleter> weak_ptr_factory_;
+};
+
+}  // namespace cc
+
+#endif  // CC_RESOURCES_TEXTURE_MAILBOX_DELETER_H_