Separate gfx_ipc into skia-dependent and non-skia-dependent parts

ui/gfx/ipc/skia/BUILD.gn

Index: ui/gfx/ipc/skia/BUILD.gn
diff --git a/ui/gfx/ipc/BUILD.gn b/ui/gfx/ipc/skia/BUILD.gn
similarity index 61%
copy from ui/gfx/ipc/BUILD.gn
copy to ui/gfx/ipc/skia/BUILD.gn
index 28da16626353091131eeded269434d3a24a469f4..60718d2eeae12601a5bed34c56cbae66e8d87f5d 100644
--- a/ui/gfx/ipc/BUILD.gn
+++ b/ui/gfx/ipc/skia/BUILD.gn
@@ -2,16 +2,15 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-component("ipc") {
-  output_name = "gfx_ipc"
+component("skia") {
+  output_name = "gfx_ipc_skia"
 
   sources = [
-    "gfx_param_traits.cc",
-    "gfx_param_traits.h",
-    "gfx_param_traits_macros.h",
+    "gfx_skia_param_traits.cc",
+    "gfx_skia_param_traits.h",
   ]
 
-  defines = [ "GFX_IPC_IMPLEMENTATION" ]
+  defines = [ "GFX_SKIA_IPC_IMPLEMENTATION" ]
 
   deps = [
     "//base",
@@ -19,5 +18,6 @@ component("ipc") {
     "//skia",
     "//ui/gfx",
     "//ui/gfx/geometry",
+    "//ui/gfx/ipc",
   ]
 }