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.cc b/cc/animation/target_property.cc
new file mode 100644
index 0000000..15144a7
--- /dev/null
+++ b/cc/animation/target_property.cc
@@ -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.
+
+#include "cc/animation/target_property.h"
+
+#include "base/macros.h"
+
+namespace cc {
+
+namespace {
+
+// This should match the TargetProperty enum.
+static const char* const s_targetPropertyNames[] = {
+    "TRANSFORM", "OPACITY", "FILTER", "SCROLL_OFFSET", "BACKGROUND_COLOR"};
+
+static_assert(static_cast<int>(TargetProperty::LAST_TARGET_PROPERTY) + 1 ==
+                  arraysize(s_targetPropertyNames),
+              "TargetPropertyEnumSize should equal the number of elements in "
+              "s_targetPropertyNames");
+
+}  // namespace
+
+const char* TargetProperty::GetName(TargetProperty::Type property) {
+  return s_targetPropertyNames[property];
+}
+
+}  // namespace cc