[webnfc] Implement push method for Android nfc mojo service.

content/browser/frame_host/render_frame_host_impl.cc

Index: content/browser/frame_host/render_frame_host_impl.cc
diff --git a/content/browser/frame_host/render_frame_host_impl.cc b/content/browser/frame_host/render_frame_host_impl.cc
index f53f9cdea2c69ec7cf8a90f6fb0aa088ec0a7ec5..ceb91427e216cac2131e3ade66b51a34ab2661c4 100644
--- a/content/browser/frame_host/render_frame_host_impl.cc
+++ b/content/browser/frame_host/render_frame_host_impl.cc
@@ -1937,8 +1937,10 @@ void RenderFrameHostImpl::RegisterMojoServices() {
                    base::Unretained(this)));
   }
 
+#if !defined(OS_ANDROID)

[ncarter (slow), 2016/04/25 20:03:14]

Please add a comment:

 // On android, NFC is implemented as a Java mojo service.

[shalamov, 2016/04/26 21:56:52]

Done.

   GetServiceRegistry()->AddService<device::NFC>(
       base::Bind(&device::NFCImpl::Create));

[ncarter (slow), 2016/04/25 20:03:14]

This line doesn't seem to exist at tip of tree; I see that this is a dependent
patch, several layers deep.

Are you planning on landing
https://codereview.chromium.org/1912363002/diff/120001/content/browser/frame_...
first? Should I review that one to?

[shalamov, 2016/04/26 21:56:52]

Yes, I'm planning to land https://crrev.com/1912363002 first. Reilly Grant,
helped to review that CL. If you have time, please take a look.

+#endif
 
   if (!frame_mojo_shell_)
     frame_mojo_shell_.reset(new FrameMojoShell(this));