Fix wide gap to the right of New Tab button when no caption buttons.

If there are no caption buttons (e.g., maximized window in Unity), or
the caption buttons are on the left, the New Tab button now has a small
5px gap to the right, instead of a wide 16px gap.

BUG=329749

Review URL: https://codereview.chromium.org/119763004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@242346 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 242346
Fixes in base for [P]NaCl port of remoting client

Various minor fixes in base needed for [P]NaCl port of remoting client:
  - added base_i18n_untrusted target
  - md5 is included in base_untrusted.
  - base/metrics is compiled in base_untrusted (src/net depends on it).
  - enabled PNaCl build of base_untrusted
  - __builtin_extract_return_addr() is not allowed in PNaCl (validator
    rejects it).
  - sys_byteorder.h now works in NaCl.

BUG=276739

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=242270

R=brettw@chromium.org

Review URL: https://codereview.chromium.org/116803005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@242347 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 242347