Move ui/gfx/animation/ into its own component.

ui/gfx/animation/BUILD.gn

Index: ui/gfx/animation/BUILD.gn
diff --git a/ui/gfx/animation/BUILD.gn b/ui/gfx/animation/BUILD.gn
new file mode 100644
index 0000000000000000000000000000000000000000..d561028d158d22ca88cc11e915a488ed6bbd9a6a
--- /dev/null
+++ b/ui/gfx/animation/BUILD.gn
@@ -0,0 +1,63 @@
+# Copyright 2017 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.
+
+import("//build/config/ui.gni")
+
+if (is_android) {
+  import("//build/config/android/config.gni")
+  import("//build/config/android/rules.gni")
+}
+
+component("animation") {
+  sources = [
+    "animation.cc",
+    "animation.h",
+    "animation_container.cc",
+    "animation_container.h",
+    "animation_container_element.h",
+    "animation_container_observer.h",
+    "animation_delegate.h",
+    "animation_export.h",
+    "animation_mac.mm",
+    "animation_win.cc",
+    "linear_animation.cc",
+    "linear_animation.h",
+    "multi_animation.cc",
+    "multi_animation.h",
+    "slide_animation.cc",
+    "slide_animation.h",
+    "throb_animation.cc",
+    "throb_animation.h",
+    "tween.cc",
+    "tween.h",
+  ]
+
+  if (is_android) {
+    if (!use_aura) {
+      sources -= [
+        "throb_animation.cc",
+        "throb_animation.h",
+      ]
+    }
+  }
+
+  if (is_mac) {
+    libs = [
+      "AppKit.framework",
+      "CoreFoundation.framework",
+      "CoreGraphics.framework",
+      "CoreText.framework",
+      "IOSurface.framework",
+    ]
+  }
+
+  deps = [
+    "//base",
+    "//skia",
+    "//ui/gfx:geometry_skia",
+    "//ui/gfx:gfx_export",
+    "//ui/gfx/geometry",
+  ]
+  defines = [ "ANIMATION_IMPLEMENTATION" ]
+}