Fix SecureOriginWhiteListTest.UnsafelyTreatInsecureOriginAsSecure to not leak test state

chrome/common/secure_origin_whitelist_unittest.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/command_line.h"
+#include "base/test/scoped_command_line.h"
 #include "chrome/common/chrome_switches.h"
 #include "content/public/common/origin_util.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "url/gurl.h"
 
 using content::IsOriginSecure;
 
 namespace chrome {
 
-TEST(SecureOriginWhiteList, UnsafelyTreatInsecureOriginAsSecure) {
+class SecureOriginWhiteListTest : public testing::Test {
+  void TearDown() override {
+    // Ensure that we reset the whitelisted origins without any flags applied.
+    content::ResetSchemesAndOriginsWhitelistForTesting();
+  };
+};
+
+TEST_F(SecureOriginWhiteListTest, UnsafelyTreatInsecureOriginAsSecure) {
   EXPECT_FALSE(content::IsOriginSecure(GURL("http://example.com/a.html")));
   EXPECT_FALSE(
       content::IsOriginSecure(GURL("http://127.example.com/a.html")));
-
   // Add http://example.com and http://127.example.com to whitelist by
   // command-line and see if they are now considered secure origins.
   // (The command line is applied via
   // ChromeContentClient::AddSecureSchemesAndOrigins)
-  base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
+  base::test::ScopedCommandLine scoped_command_line;
+  base::CommandLine* command_line = scoped_command_line.GetProcessCommandLine();
   command_line->AppendSwitchASCII(
       switches::kUnsafelyTreatInsecureOriginAsSecure,
       "http://example.com,http://127.example.com");
   command_line->AppendSwitch(switches::kUserDataDir);
   content::ResetSchemesAndOriginsWhitelistForTesting();
 
   // They should be now white-listed.
   EXPECT_TRUE(content::IsOriginSecure(GURL("http://example.com/a.html")));
   EXPECT_TRUE(content::IsOriginSecure(GURL("http://127.example.com/a.html")));
 
   // Check that similarly named sites are not considered secure.
   EXPECT_FALSE(content::IsOriginSecure(GURL("http://128.example.com/a.html")));
   EXPECT_FALSE(content::IsOriginSecure(
       GURL("http://foobar.127.example.com/a.html")));
 }
 
 }  // namespace chrome