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

chrome/browser/media/chrome_webrtc_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 "base/strings/stringprintf.h"
 #include "chrome/browser/media/webrtc_browsertest_base.h"
 #include "chrome/browser/media/webrtc_browsertest_common.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_tabstrip.h"
@@ skipping 10 matching lines @@
 
 // Top-level integration test for WebRTC. It always uses fake devices; see
 // WebRtcWebcamBrowserTest for a test that acquires any real webcam on the
 // system.
 class WebRtcBrowserTest : public WebRtcTestBase {
  public:
   void SetUpInProcessBrowserTestFixture() override {
     DetectErrorsInJavaScript();  // Look for errors in our rather complex js.
   }
 
-  void SetUpCommandLine(CommandLine* command_line) override {
+  void SetUpCommandLine(base::CommandLine* command_line) override {
     // Ensure the infobar is enabled, since we expect that in this test.
     EXPECT_FALSE(command_line->HasSwitch(switches::kUseFakeUIForMediaStream));
 
     // Always use fake devices.
     command_line->AppendSwitch(switches::kUseFakeDeviceForMediaStream);
 
     // Flag used by TestWebAudioMediaStream to force garbage collection.
     command_line->AppendSwitchASCII(switches::kJavaScriptFlags, "--expose-gc");
   }
 };
@@ skipping 41 matching lines @@
   GURL url(embedded_test_server()->GetURL("/webrtc/webaudio_crash.html"));
   ui_test_utils::NavigateToURL(browser(), url);
   content::WebContents* tab =
       browser()->tab_strip_model()->GetActiveWebContents();
 
   // A sleep is necessary to be able to detect the crash.
   test::SleepInJavascript(tab, 1000);
 
   ASSERT_FALSE(tab->IsCrashed());
 }