Add lots of GN targets

ui/gfx/ipc/BUILD.gn

Index: ui/gfx/ipc/BUILD.gn
diff --git a/components/tracing/BUILD.gn b/ui/gfx/ipc/BUILD.gn
similarity index 56%
copy from components/tracing/BUILD.gn
copy to ui/gfx/ipc/BUILD.gn
index c2e05190ad6e7a0996e2713071e35a4bea4525fe..8f11fa8db0fb5d0b9fce0247fcf54083d0b3ba36 100644
--- a/components/tracing/BUILD.gn
+++ b/ui/gfx/ipc/BUILD.gn
@@ -2,16 +2,20 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-source_set("tracing") {
+component("ipc") {
+  output_name = "gfx_ipc"
+
   sources = [
-    "child_trace_message_filter.cc",
-    "child_trace_message_filter.h",
-    "tracing_messages.cc",
-    "tracing_messages.h",
+    "gfx_param_traits.cc",
+    "gfx_param_traits.h",
   ]
 
+  defines = [ "GFX_IPC_IMPLEMENTATION" ]
+
   deps = [
     "//base",
     "//ipc",
+    "//skia",
+    "//ui/gfx",
   ]
 }