Allow the --gaia-profile-info flag on Linux

The original reason for disabling it was fixed in 
https://chromiumcodereview.appspot.com/18533004

BUG=none
TEST=In about://flags, --gaia-profile-info should be available on Linux.

Review URL: https://chromiumcodereview.appspot.com/18486011

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@211229 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/browser/about_flags.cc b/chrome/browser/about_flags.cc
index 477d28f..996e86d2 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -1617,7 +1617,7 @@
     "enable-gaia-profile-info",
     IDS_FLAGS_ENABLE_GAIA_PROFILE_INFO_NAME,
     IDS_FLAGS_ENABLE_GAIA_PROFILE_INFO_DESCRIPTION,
-    kOsMac | kOsWin,
+    kOsMac | kOsWin | kOsLinux,
     SINGLE_VALUE_TYPE(switches::kGaiaProfileInfo)
   },
 #if defined(OS_WIN)