Add IPC support for gfx::ColorSpace

ui/gfx/ipc/color/BUILD.gn

 # 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.
 
-source_set("test") {
-  testonly = true
+component("color") {
+  output_name = "gfx_ipc_color"
 
   sources = [
-    "test_blimp_client_context_delegate.cc",
-    "test_blimp_client_context_delegate.h",
+    "gfx_param_traits.cc",
+    "gfx_param_traits.h",
   ]
 
+  defines = [ "GFX_IPC_COLOR_IMPLEMENTATION" ]
+
   deps = [
     "//base",
-    "//blimp/client/public:public_headers",
+    "//ipc",
+    "//ui/gfx:gfx",
   ]
 }