Roll Chromeos system_api (new methods in cryptohome API)

BUG=244472
TBR=

Review URL: https://codereview.chromium.org/190553003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@255753 0039d316-1c4b-4281-b951-d872f2087c98

DEPS

@@ -482,7 +482,7 @@ deps_os = {
     # For Linux and Chromium OS.
     "src/third_party/cros_system_api":
       Var("chromiumos_git") + "/platform/system_api.git" +
-      "@096d48842a57dbb7c8043201576424f34eb5609c",
+      "@cca4793e883a03da9d472dbe0712104d49119b00",
 
     # Note that this is different from Android's freetype repo.
     "src/third_party/freetype2/src":