Turn the utility process image decoder into a Mojo service.

services/image_decoder/public/BUILD.gn

Index: services/image_decoder/public/BUILD.gn
diff --git a/services/image_decoder/public/BUILD.gn b/services/image_decoder/public/BUILD.gn
new file mode 100644
index 0000000000000000000000000000000000000000..b4005a28a0988c54b66332bbab054259c06bdec7
--- /dev/null
+++ b/services/image_decoder/public/BUILD.gn
@@ -0,0 +1,20 @@
+# Copyright 2015 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("public") {
+  sources = [
+    "type_converters.cc",
+    "type_converters.h",
+  ]
+
+  public_deps = [
+    "//services/image_decoder/public/interfaces",
+  ]
+
+  deps = [
+    "//base",
+    "//skia",
+    "//third_party/mojo/src/mojo/public/cpp/bindings",
+  ]
+}