Move DisplayCompositor code to new component.

components/frame_sinks/BUILD.gn

Index: components/frame_sinks/BUILD.gn
diff --git a/components/frame_sinks/BUILD.gn b/components/frame_sinks/BUILD.gn
new file mode 100644
index 0000000000000000000000000000000000000000..2a8e4fc912e15d45ec076732a66833acee732d09
--- /dev/null
+++ b/components/frame_sinks/BUILD.gn
@@ -0,0 +1,30 @@
+# 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.
+
+component("frame_sinks") {
+  sources = [
+    "display_compositor.cc",
+    "display_compositor.h",
+    "frame_sinks_export.h",
+    "gpu_compositor_frame_sink.cc",
+    "gpu_compositor_frame_sink.h",
+    "gpu_compositor_frame_sink_delegate.h",
+    "gpu_root_compositor_frame_sink.cc",
+    "gpu_root_compositor_frame_sink.h",
+  ]
+
+  defines = [ "FRAME_SINKS_IMPLEMENTATION" ]
+
+  deps = [
+    "//base",
+    "//cc/ipc:interfaces",
+    "//cc/surfaces",
+    "//gpu/command_buffer/client",
+    "//gpu/command_buffer/client:gles2_interface",
+    "//gpu/ipc:command_buffer",
+
+    # TODO(kylechar): Break this dependency.
+    "//services/ui/surfaces",
+  ]
+}