arc: Move platform2/arc/network/ to platform2/patchpanel

Next step in the arc-networkd -> patchpanel rename, this patch moves the
location of the code.

BUG=b:151879931
TEST=units,flashed image to atlas
TEST=tasts arc.PlayStore, crostini.LaunchTerminal.download

Change-Id: I1b5cf8d670e1631d46f6449b725395157bf88dde
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform2/+/2115863
Tested-by: Garrick Evans <garrick@chromium.org>
Commit-Queue: Garrick Evans <garrick@chromium.org>
Reviewed-by: Hidehiko Abe <hidehiko@chromium.org>
Reviewed-by: Eric Caruso <ejcaruso@chromium.org>
Reviewed-by: Chirantan Ekbote <chirantan@chromium.org>
Reviewed-by: Hugo Benichi <hugobenichi@google.com>
diff --git a/patchpanel/fake_process_runner.h b/patchpanel/fake_process_runner.h
new file mode 100644
index 0000000..27ee171
--- /dev/null
+++ b/patchpanel/fake_process_runner.h
@@ -0,0 +1,92 @@
+// Copyright 2019 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef PATCHPANEL_FAKE_PROCESS_RUNNER_H_
+#define PATCHPANEL_FAKE_PROCESS_RUNNER_H_
+
+#include <string>
+#include <utility>
+#include <vector>
+
+#include <base/strings/string_util.h>
+
+#include <gtest/gtest.h>
+
+#include "patchpanel/minijailed_process_runner.h"
+
+namespace patchpanel {
+
+class FakeProcessRunner : public MinijailedProcessRunner {
+ public:
+  explicit FakeProcessRunner(std::vector<std::string>* runs = nullptr)
+      : runs_(runs ? runs : &runs_vec_) {}
+  ~FakeProcessRunner() = default;
+
+  int Run(const std::vector<std::string>& argv, bool log_failures) override {
+    if (capture_)
+      runs_->emplace_back(base::JoinString(argv, " "));
+    if (run_override_)
+      return run_override_.Run(argv);
+    return 0;
+  }
+
+  int RestoreDefaultNamespace(const std::string& ifname, pid_t pid) override {
+    return 0;
+  }
+
+  void Capture(bool on, std::vector<std::string>* runs = nullptr) {
+    capture_ = on;
+    if (runs)
+      runs_ = runs;
+  }
+
+  void VerifyRuns(const std::vector<std::string>& expected) {
+    VerifyRuns(*runs_, expected);
+  }
+
+  static void VerifyRuns(const std::vector<std::string>& got,
+                         const std::vector<std::string>& expected) {
+    ASSERT_EQ(got.size(), expected.size());
+    for (int i = 0; i < got.size(); ++i) {
+      EXPECT_EQ(got[i], expected[i]);
+    }
+  }
+
+  void VerifyAddInterface(const std::string& host_ifname,
+                          const std::string& con_ifname,
+                          uint32_t con_ipv4,
+                          uint32_t con_prefix_len,
+                          bool enable_multicast,
+                          const std::string& con_pid) {
+    EXPECT_EQ(host_ifname, add_host_ifname_);
+    EXPECT_EQ(con_ifname, add_con_ifname_);
+    EXPECT_EQ(con_ipv4, add_con_ipv4_);
+    EXPECT_EQ(con_prefix_len, add_con_prefix_len_);
+    EXPECT_EQ(enable_multicast, add_enable_multicast_);
+    EXPECT_EQ(con_pid, add_con_pid_);
+  }
+
+  void SetRunOverride(
+      base::Callback<int(const std::vector<std::string>&)> callback) {
+    run_override_ = callback;
+  }
+
+ private:
+  bool capture_ = false;
+  base::Callback<int(const std::vector<std::string>&)> run_override_;
+  std::vector<std::string>* runs_;
+  std::vector<std::string> runs_vec_;
+  std::string add_host_ifname_;
+  std::string add_con_ifname_;
+  uint32_t add_con_ipv4_;
+  uint32_t add_con_prefix_len_;
+  bool add_enable_multicast_;
+  std::string add_con_pid_;
+
+  DISALLOW_COPY_AND_ASSIGN(FakeProcessRunner);
+};
+
+}  // namespace patchpanel
+
+#endif  // PATCHPANEL_FAKE_PROCESS_RUNNER_H_