win: Use FormatMessage[W]() instead of FormatMessageA() for logging

win: Use FormatMessage[W]() instead of FormatMessageA() for logging

FormatMessageA() returns a message in the system's native code page,
but the logging interface expects and assumes UTF-8. UTF-8 can be
obtained by calling the UTF-16 FormatMessage() variant and converting.

R=scottmg@chromium.org

Committed: https://chromium.googlesource.com/chromium/mini_chromium/+/06e0fa1309a04bca3d785cc5635840366ba73682

[Mark Mentovai, 2015-11-09 20:25:52]

mark@chromium.org changed reviewers:
+ scottmg@chromium.org

[Mark Mentovai, 2015-11-09 20:25:53]

This includes two other changes:
 - It switches the GetLastError() code formatting to decimal, to match
   the declarations in <winerror.h>.
 - It gets rid of the double-spacing in PLOG() messages. I wouldn’t
   normally have done anything about this, but since the code was right
   here…

Messages change from this:

[p:t:yyyymmdd,hhmmss.mmm:FATAL exception_handler_server.cc:357] Check failed:
pipe != INVALID_HANDLE_VALUE. CreateNamedPipe: The specified path is invalid. 
(0xA1)

to this:

[p:t:yyyymmdd,hhmmss.mmm:FATAL exception_handler_server.cc:357] Check failed:
pipe != INVALID_HANDLE_VALUE. CreateNamedPipe: The specified path is invalid.
(161)

[scottmg, 2015-11-09 20:43:14]

lgtm

[Mark Mentovai, 2015-11-09 20:48:39]

Committed patchset #1 (id:1) manually as
06e0fa1309a04bca3d785cc5635840366ba73682 (presubmit successful).