Avoid global time function in network_tester tool

Bug: webrtc:42223992
Change-Id: Ic72d58c26781cb0e3cc46f7396552462456145cc
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/481022
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Auto-Submit: Danil Chapovalov <danilchap@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#47979}

rtc_tools/network_tester/BUILD.gn

diff --git a/rtc_tools/network_tester/BUILD.gn b/rtc_tools/network_tester/BUILD.gn
index eeac69b..554ff37 100644
--- a/rtc_tools/network_tester/BUILD.gn
+++ b/rtc_tools/network_tester/BUILD.gn
@@ -87,12 +87,8 @@
 
     deps = [
       ":network_tester",
-      "../../api:rtc_error_matchers",
       "../../api/environment",
-      "../../api/environment:environment_factory",
       "../../rtc_base:random",
-      "../../rtc_base:threading",
-      "../../rtc_base:timeutils",
       "../../test:create_test_environment",
       "../../test:fileutils",
       "../../test:run_loop",

rtc_tools/network_tester/network_tester_unittest.cc

diff --git a/rtc_tools/network_tester/network_tester_unittest.cc b/rtc_tools/network_tester/network_tester_unittest.cc
index 8798bf5..dc18aa3 100644
--- a/rtc_tools/network_tester/network_tester_unittest.cc
+++ b/rtc_tools/network_tester/network_tester_unittest.cc
@@ -14,7 +14,6 @@
 
 #include "api/environment/environment.h"
 #include "rtc_base/random.h"
-#include "rtc_base/time_utils.h"
 #include "rtc_tools/network_tester/test_controller.h"
 #include "test/create_test_environment.h"
 #include "test/gtest.h"
@@ -25,15 +24,15 @@
 namespace webrtc {
 
 TEST(NetworkTesterTest, ServerClient) {
-  // Use a unique port rather than a hard-coded one to avoid collision when
-  // running the test in parallel in stress runs. Skipping all reserved ports.
-  const int MIN_PORT = 49152;
-  const int MAX_PORT = 65535;
-  int port = Random(TimeMicros()).Rand(MIN_PORT, MAX_PORT);
-
   test::RunLoop main_thread;
   Environment env = CreateTestEnvironment();
 
+  // Use a unique port rather than a hard-coded one to avoid collision when
+  // running the test in parallel in stress runs. Skipping all reserved ports.
+  const int kMinPort = 49152;
+  const int kMaxPort = 65535;
+  int port = Random(env.clock().TimeInMicroseconds()).Rand(kMinPort, kMaxPort);
+
   TestController client(
       env, 0, 0, test::ResourcePath("network_tester/client_config", "dat"),
       test::OutputPath() + "client_packet_log.dat");