Move //services/clipboard code out of namespace mojo

Move //services/clipboard code out of namespace mojo

Now that the code doesn't live under //mojo/services/ it doesn't make
sense for the types to exist in namespace mojo.

R=erg@chromium.org

Committed: https://chromium.googlesource.com/external/mojo/+/e2f296aa83dec357ed3ce6b7ac951d5b7ac56f23

[jamesr, 2014-12-04 23:12:54]

Could also go with 'namespace clipboard', and 'namespace foo' for
//services/foo.

[Elliot Glaysher, 2014-12-04 23:16:27]

lgtm

https://codereview.chromium.org/779063003/diff/1/services/clipboard/clipboard...
File services/clipboard/clipboard_apptest.cc (right):

https://codereview.chromium.org/779063003/diff/1/services/clipboard/clipboard...
services/clipboard/clipboard_apptest.cc:46: using mojo::String;
This should be above the anonymous namespace. (And that would let you pull out
more mojo::.)

[jamesr, 2014-12-04 23:49:40]

Thanks, that's better.  I'm leaning towards 'namespace clipboard'

[jamesr, 2014-12-05 19:16:43]

Committed patchset #1 (id:1) manually as
e2f296aa83dec357ed3ce6b7ac951d5b7ac56f23 (presubmit successful).