Convert some third_party deps to GN

third_party/iccjpeg/BUILD.gn

Index: third_party/iccjpeg/BUILD.gn
diff --git a/third_party/iccjpeg/BUILD.gn b/third_party/iccjpeg/BUILD.gn
new file mode 100644
index 0000000000000000000000000000000000000000..7f3596d8884ab05f857c2e483127002fc641f196
--- /dev/null
+++ b/third_party/iccjpeg/BUILD.gn
@@ -0,0 +1,17 @@
+# Copyright (c) 2013 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.
+
+config("iccjpeg_config") {
+  include_dirs = [ "." ]
+}
+
+source_set("iccjpeg") {
+  sources = [
+    "iccjpeg.c",
+    "iccjpeg.h"
+  ]
+
+  direct_dependent_configs = [ ":iccjpeg_config" ]
+  deps = [ "//third_party:jpeg" ]
+}