Initialize CommandLine before TaskScheduler in quic.

TaskScheduler needs access to command line arguments in an
upcoming CL that allows disabling background tasks via a command
line argument
(https://chromium-review.googlesource.com/c/chromium/src/+/996439).

The order of initialization matches what is done elsewhere in the
codebase.

Bug: 726937
Change-Id: I4e709db4c7f36c9e062d43aa686f5309cc8f3745
Reviewed-on: https://chromium-review.googlesource.com/996559Reviewed-by: Ryan Hamilton <rch@chromium.org>
Commit-Queue: François Doray <fdoray@chromium.org>
Cr-Commit-Position: refs/heads/master@{#548416}

net/tools/quic/quic_server_bin.cc

@@ -33,13 +33,13 @@ std::unique_ptr<net::ProofSource> CreateProofSource(
 }
 
 int main(int argc, char* argv[]) {
-  base::TaskScheduler::CreateAndStartWithDefaultParams("quic_server");
   base::AtExitManager exit_manager;
-  base::MessageLoopForIO message_loop;
-
   base::CommandLine::Init(argc, argv);
   base::CommandLine* line = base::CommandLine::ForCurrentProcess();
 
+  base::MessageLoopForIO message_loop;
+  base::TaskScheduler::CreateAndStartWithDefaultParams("quic_server");
+
   logging::LoggingSettings settings;
   settings.logging_dest = logging::LOG_TO_SYSTEM_DEBUG_LOG;
   CHECK(logging::InitLogging(settings));

net/tools/quic/quic_simple_client_bin.cc

@@ -136,10 +136,10 @@ class FakeProofVerifier : public ProofVerifier {
 };
 
 int main(int argc, char* argv[]) {
-  base::TaskScheduler::CreateAndStartWithDefaultParams("quic_client");
   base::CommandLine::Init(argc, argv);
   base::CommandLine* line = base::CommandLine::ForCurrentProcess();
   const base::CommandLine::StringVector& urls = line->GetArgs();
+  base::TaskScheduler::CreateAndStartWithDefaultParams("quic_client");
 
   logging::LoggingSettings settings;
   settings.logging_dest = logging::LOG_TO_SYSTEM_DEBUG_LOG;