Adds plumbing to pass WebUI mojo::Handle from browser to renderer

content/content_common_mojo_bindings.gypi

+# Copyright 2014 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': [
+    {
+      'target_name': 'content_common_mojo_bindings',
+      'type': 'static_library',
+      'dependencies': [
+        '../mojo/mojo.gyp:mojo_bindings',
+        '../mojo/mojo.gyp:mojo_environment_chromium',
+        '../mojo/mojo.gyp:mojo_system',
+      ],
+      'sources': [
+        'common/mojo/render_process.mojom',
+      ],
+      # TODO(sky): this shouldn't be necessary. It's working around a bug in
+      # gyp.
+      'variables': {
+        'mojom_base_output_dir': 'content',
+      },
+      'includes': [ '../mojo/public/bindings/mojom_bindings_generator.gypi' ],
+      'export_dependent_settings': [
+        '../mojo/mojo.gyp:mojo_bindings',
+        '../mojo/mojo.gyp:mojo_environment_chromium',
+        '../mojo/mojo.gyp:mojo_system',
+      ],
+    },
+  ],
+}