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

chrome/browser/media/chrome_webrtc_perf_browsertest.cc

 // Copyright 2014 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/files/file_util.h"
 #include "base/json/json_reader.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/string_split.h"
 #include "base/strings/stringprintf.h"
@@ skipping 19 matching lines @@
 
 // Performance browsertest for WebRTC. This test is manual since it takes long
 // to execute and requires the reference files provided by the webrtc.DEPS
 // solution (which is only available on WebRTC internal bots).
 class WebRtcPerfBrowserTest : 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));
 
     // Play a suitable, somewhat realistic video file.
     base::FilePath input_video = test::GetReferenceFilesDir()
         .Append(test::kReferenceFileName360p)
         .AddExtension(test::kY4mFileExtension);
     command_line->AppendSwitchPath(switches::kUseFileForFakeVideoCapture,
                                    input_video);
     command_line->AppendSwitch(switches::kUseFakeDeviceForMediaStream);
@@ skipping 135 matching lines @@
 
   const base::DictionaryValue* second_pc_dict =
       GetDataOnPeerConnection(all_data.get(), 1);
   ASSERT_TRUE(second_pc_dict != NULL);
   test::PrintBweForVideoMetrics(*second_pc_dict, "_recvonly");
   test::PrintMetricsForAllStreams(*second_pc_dict, "_recvonly");
 
   HangUp(left_tab);
   HangUp(right_tab);
 }