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

chrome/browser/ui/search/instant_extended_interactive_uitest.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 <sstream>
 
 #include "base/command_line.h"
 #include "base/metrics/histogram_base.h"
 #include "base/metrics/histogram_samples.h"
 #include "base/metrics/statistics_recorder.h"
@@ skipping 248 matching lines @@
   void SetUpInProcessBrowserTestFixture() override {
     chrome::EnableQueryExtractionForTesting();
     ASSERT_TRUE(https_test_server().Start());
     GURL instant_url = https_test_server().GetURL(
         "files/instant_extended.html?strk=1&");
     GURL ntp_url = https_test_server().GetURL(
         "files/instant_extended_ntp.html?strk=1&");
     InstantTestBase::Init(instant_url, ntp_url, true);
   }
 
-  void SetUpCommandLine(CommandLine* command_line) override {
+  void SetUpCommandLine(base::CommandLine* command_line) override {
     command_line->AppendSwitchASCII(
         switches::kForceFieldTrials,
         "EmbeddedSearch/Group11 prefetch_results_srp:1/");
   }
 
   net::FakeURLFetcherFactory* fake_factory() { return fake_factory_.get(); }
 
  private:
   // Used to instantiate FakeURLFetcherFactory.
   scoped_ptr<net::URLFetcherImplFactory> factory_;
@@ skipping 689 matching lines @@
   stream << "link.href = \"" << result_url.spec() << "\";";
   stream << "document.body.appendChild(link);";
   stream << "link.click();";
   EXPECT_TRUE(content::ExecuteScript(contents, stream.str()));
 
   content::WaitForLoadStop(contents);
   std::string expected_title =
       "Referrer is " + instant_url().GetWithEmptyPath().spec();
   EXPECT_EQ(ASCIIToUTF16(expected_title), contents->GetTitle());
 }