shill, libchromeos: Move the minijail c++ bindings

This CL moves the c++ binding for minijail from shill
into libchromeos

BUG=None
TEST=emerge-lumpy libchromeos && FEATURES=test emerge-lumpy platform2
CQ-DEPEND=CL:210408

Change-Id: Ia087ffbf4f54e08fff450f0e2b7984e9eb3448e3
Reviewed-on: https://chromium-review.googlesource.com/210379
Tested-by: Utkarsh Sanghi <usanghi@chromium.org>
Reviewed-by: Jorge Lucangeli Obes <jorgelo@chromium.org>
Reviewed-by: Bertrand Simonnet <bsimonnet@chromium.org>
Commit-Queue: Utkarsh Sanghi <usanghi@chromium.org>
Reviewed-by: Alex Deymo <deymo@chromium.org>
diff --git a/dhcp_config_unittest.cc b/dhcp_config_unittest.cc
index 255a7a1..63e4471 100644
--- a/dhcp_config_unittest.cc
+++ b/dhcp_config_unittest.cc
@@ -12,6 +12,7 @@
 #include <base/files/scoped_temp_dir.h>
 #include <base/strings/stringprintf.h>
 #include <chromeos/dbus/service_constants.h>
+#include <chromeos/minijail/mock_minijail.h>
 
 #include "shill/dbus_adaptor.h"
 #include "shill/dhcp_provider.h"
@@ -21,7 +22,6 @@
 #include "shill/mock_glib.h"
 #include "shill/mock_log.h"
 #include "shill/mock_metrics.h"
-#include "shill/mock_minijail.h"
 #include "shill/mock_proxy_factory.h"
 #include "shill/property_store_unittest.h"
 #include "shill/testing.h"
@@ -30,6 +30,7 @@
 using base::FilePath;
 using base::ScopedTempDir;
 using base::Unretained;
+using chromeos::MockMinijail;
 using std::string;
 using std::vector;
 using testing::_;