CC Animation: Expose TargetProperty enum to be aliased in Blink Platform.

TargetProperty is intended to be used as an alias in Source/platform/animation/CompositorTargetProperty.h

This is slightly better then untyped approach used here:
https://codereview.chromium.org/1599673002
where we setup struct with constants in it and pass uint32_t everywhere.

An alternative approach with strongly typed enum
considered too verbose:
https://codereview.chromium.org/1698813002/

BUG=577016
CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel

Review URL: https://codereview.chromium.org/1700653002

Cr-Commit-Position: refs/heads/master@{#377501}

1 files changed, 28 insertions, 0 deletions

diff --git a/cc/animation/target_property.h b/cc/animation/target_property.h
new file mode 100644
index 0000000..e4658e1
--- /dev/null
+++ b/cc/animation/target_property.h
@@ -0,0 +1,28 @@
+// Copyright (c) 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_ANIMATION_TARGET_PROPERTY_H_
+#define CC_ANIMATION_TARGET_PROPERTY_H_
+
+namespace cc {
+
+namespace TargetProperty {
+
+enum Type {
+  TRANSFORM = 0,
+  OPACITY,
+  FILTER,
+  SCROLL_OFFSET,
+  BACKGROUND_COLOR,
+  // This sentinel must be last.
+  LAST_TARGET_PROPERTY = BACKGROUND_COLOR
+};
+
+const char* GetName(TargetProperty::Type property);
+
+}  // namespace TargetProperty
+
+}  // namespace cc
+
+#endif  // CC_ANIMATION_TARGET_PROPERTY_H_