gn: Default is_clang to true on iOS.

Mirrors this condition in build/common.gypi:

      ['OS == "ios"', {
        # ...

        # Enable clang and host builds when generating with ninja-ios.
        'conditions': [
          ['"<(GENERATOR)"=="ninja"', {
            'clang%': 1,
            'host_os%': "mac",
          }]
        ],
      }],

BUG=336531
TBR=brettw@chromium.org

Review URL: https://codereview.chromium.org/143323008

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@246117 0039d316-1c4b-4281-b951-d872f2087c98
rAc - use i18nized address format for display of address

BUG=333372

Review URL: https://codereview.chromium.org/137893019

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@246119 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 246117
SVN changes up to revision 246119