Adds the ability for the renderer to create the mojo channel

content/content_common.gypi

Index: content/content_common.gypi
diff --git a/content/content_common.gypi b/content/content_common.gypi
index 8e46bb5b3c4be2c59489cf8bb1f8fe723eb2c2df..9c77a08ceb255c842e941f4ac015fda7072bfc90 100644
--- a/content/content_common.gypi
+++ b/content/content_common.gypi
@@ -324,6 +324,9 @@
     'common/message_router.cc',
     'common/message_router.h',
     'common/mime_registry_messages.h',
+    'common/mojo/mojo_channel_init.cc',
+    'common/mojo/mojo_channel_init.h',
+    'common/mojo/mojo_messages.h',
     'common/navigation_gesture.h',
     'common/net/url_fetcher.cc',
     'common/net/url_request_user_data.cc',
@@ -479,6 +482,19 @@
         'content.gyp:webkit_version',
       ],
     }],
+    # TODO(sky): conditional temporary until mojo is sorted out on mac.
+    ['OS=="mac"', {
+      'sources!': [
+        'common/mojo/mojo_channel_init.cc',
+        'common/mojo/mojo_channel_init.h',
+      ],
+    }, {
+      'dependencies': [
+        '../mojo/mojo.gyp:mojo_environment_chromium',
+        '../mojo/mojo.gyp:mojo_system',
+        '../mojo/mojo.gyp:mojo_system_impl',
+      ],
+    }],
     ['OS=="mac"', {
       'sources': [
         'common/gpu/client/gpu_memory_buffer_impl_io_surface.cc',