win/clang: Don't token-paste ( onto function name.

win/clang: Don't token-paste ( onto function name.

Fixes

..\..\win8\metro_driver\winrt_utils.cc(80,1) :  error(clang): pasting formed 'CreateString(', an invalid preprocessing token [-Winvalid-token-paste]
IMPLEMENT_CREATE_PROPERTY(String, HSTRING);
^
..\..\win8\metro_driver\winrt_utils.cc(54,47) :  note(clang): expanded from macro 'IMPLEMENT_CREATE_PROPERTY'
  hr = property_value_statics->Create ## Name ## ( \
                                              ^

BUG=82385
TBR=grt@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=282853

[Nico, 2014-07-12 23:07:11]

The CQ bit was checked by thakis@chromium.org

[commit-bot: I haz the power, 2014-07-12 23:07:29]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/thakis@chromium.org/373423004/1

[commit-bot: I haz the power, 2014-07-13 01:04:15]

Change committed as 282853

[grt (UTC plus 2), 2014-07-14 03:11:23]

lgtm