Do not show sync promo when RestoreOnStartupURLs policy is set

base/command_line.cc

Index: base/command_line.cc
diff --git a/base/command_line.cc b/base/command_line.cc
index b743d51cc5d0d228a88992559744b012bb5beec9..7d137f266cb3e5488be5d9ae7607c35be58e67e7 100644
--- a/base/command_line.cc
+++ b/base/command_line.cc
@@ -220,6 +220,7 @@ void CommandLine::InitFromArgv(int argc,
 
 void CommandLine::InitFromArgv(const StringVector& argv) {
   argv_ = StringVector(1);
+  switches_.clear();
   begin_args_ = 1;
   SetProgram(argv.empty() ? FilePath() : FilePath(argv[0]));
   AppendSwitchesAndArguments(*this, argv);