Make callers of CommandLine use it via the base:: namespace.

content/child/site_isolation_policy_browsertest.cc

 // Copyright 2013 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 "content/public/common/content_switches.h"
 #include "content/public/test/browser_test_utils.h"
 #include "content/public/test/content_browser_test.h"
 #include "content/public/test/content_browser_test_utils.h"
 
 namespace content {
 
 // These tests simulate exploited renderer processes, which can fetch arbitrary
 // resources from other websites, not constrained by the Same Origin Policy.  We
 // are trying to verify that the renderer cannot fetch any cross-site document
 // responses even when the Same Origin Policy is turned off inside the renderer.
 class SiteIsolationPolicyBrowserTest : public ContentBrowserTest {
  public:
   SiteIsolationPolicyBrowserTest() {}
   ~SiteIsolationPolicyBrowserTest() override {}
 
-  void SetUpCommandLine(CommandLine* command_line) override {
+  void SetUpCommandLine(base::CommandLine* command_line) override {
     ASSERT_TRUE(test_server()->Start());
     net::SpawnedTestServer https_server(
         net::SpawnedTestServer::TYPE_HTTPS,
         net::SpawnedTestServer::kLocalhost,
         base::FilePath(FILE_PATH_LITERAL("content/test/data")));
     ASSERT_TRUE(https_server.Start());
 
     // Add a host resolver rule to map all outgoing requests to the test server.
     // This allows us to use "real" hostnames in URLs, which we can use to
     // create arbitrary SiteInstances.
@@ skipping 71 matching lines @@
   // <img>,<link>,<embed>, etc. Since the requested document is blocked, and one
   // character string (' ') is returned instead, this tests that the renderer
   // does not crash even when it receives a response body which is " ", whose
   // length is different from what's described in "content-length" for such
   // different targets.
   GURL foo("http://foo.com/files/cross_site_document_request_target.html");
   NavigateToURL(shell(), foo);
 }
 
 }