CC Animation: Make cc/animation an independent GN component.

cc/animation/animation_export.h

Index: cc/animation/animation_export.h
diff --git a/cc/animation/animation_export.h b/cc/animation/animation_export.h
new file mode 100644
index 0000000000000000000000000000000000000000..7fd5873aa79e848cc3ec35b2fc5301ed4dd72f96
--- /dev/null
+++ b/cc/animation/animation_export.h
@@ -0,0 +1,29 @@
+// Copyright 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_ANIMATION_EXPORT_H_
+#define CC_ANIMATION_ANIMATION_EXPORT_H_
+
+#if defined(COMPONENT_BUILD)
+#if defined(WIN32)
+
+#if defined(CC_ANIMATION_IMPLEMENTATION)
+#define CC_ANIMATION_EXPORT __declspec(dllexport)
+#else
+#define CC_ANIMATION_EXPORT __declspec(dllimport)
+#endif  // defined(CC_ANIMATION_IMPLEMENTATION)
+
+#else  // defined(WIN32)
+#if defined(CC_ANIMATION_IMPLEMENTATION)
+#define CC_ANIMATION_EXPORT __attribute__((visibility("default")))
+#else
+#define CC_ANIMATION_EXPORT
+#endif
+#endif
+
+#else  // defined(COMPONENT_BUILD)
+#define CC_ANIMATION_EXPORT
+#endif
+
+#endif  // CC_ANIMATION_ANIMATION_EXPORT_H_