Replace image_messages.h with Mojo service

ui/mojo/geometry/mojo_bindings.gyp

+# 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.
+
+{
+  'targets': [
+    {
+      # GN version: //ui/mojo/geometry
+      'target_name': 'mojo_geometry_bindings_mojom',
+      'type': 'none',
+      'variables': {
+        'mojom_files': [
+          'geometry.mojom',
+        ],
+      },
+      'includes': [ '../../../third_party/mojo/mojom_bindings_generator_explicit.gypi' ],
+    },
+    {
+      'target_name': 'mojo_geometry_bindings',
+      'type': 'static_library',
+      'dependencies': [
+        'mojo_geometry_bindings_mojom',
+        '../../../third_party/mojo/mojo_public.gyp:mojo_cpp_bindings',
+      ],
+    },
+  ],
+}