Implement media::VideoDecodeAccelerator on Mac

This CL implements media::VideoDecodeAccelerator for Mac. This will be used to implement hardware video decoding for Pepper Flash.

Currently a couple things are still missing:
  - the new VideoDecodeAcceleratorMac class needs to be hooked up to GpuVideoDecodeAccelerator
  - the PPB_VideoDecoder_Dev::Create() API needs to be extended so clients can specify the extra AVC data.

BUG=127414
TEST=Ran on Mac and Windows. Sending ARM try bots now.

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=140153

Review URL: https://chromiumcodereview.appspot.com/10388108

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@140187 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 26 insertions, 0 deletions

diff --git a/base/memory/scoped_policy.h b/base/memory/scoped_policy.h
new file mode 100644
index 0000000..4418701
--- /dev/null
+++ b/base/memory/scoped_policy.h
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 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 BASE_MEMORY_SCOPED_POLICY_H_
+#define BASE_MEMORY_SCOPED_POLICY_H_
+#pragma once
+
+namespace base {
+namespace scoped_policy {
+
+// Defines the ownership policy for a scoped object.
+enum OwnershipPolicy {
+  // The scoped object takes ownership of an object by taking over an existing
+  // ownership claim.
+  ASSUME,
+
+  // The scoped object will retain the the object and any initial ownership is
+  // not changed.
+  RETAIN
+};
+
+}  // namespace scoped_policy
+}  // namespace base
+
+#endif  // BASE_MEMORY_SCOPED_POLICY_H_