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

chrome/browser/spellchecker/feedback_sender_unittest.cc

 // Copyright (c) 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.
 //
 // Unit tests for |FeedbackSender| object.
 
 #include "chrome/browser/spellchecker/feedback_sender.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 56 matching lines @@
   }
 
   ~FeedbackSenderTest() override {}
 
  protected:
   // Appends the "--enable-spelling-service-feedback" switch to the
   // command-line.
   void AppendCommandLineSwitch() {
     // The command-line switch is temporary.
     // TODO(rouslan): Remove the command-line switch. http://crbug.com/247726
-    CommandLine::ForCurrentProcess()->AppendSwitch(
+    base::CommandLine::ForCurrentProcess()->AppendSwitch(
         switches::kEnableSpellingFeedbackFieldTrial);
     feedback_.reset(new FeedbackSender(NULL, kLanguage, kCountry));
     feedback_->StartFeedbackCollection();
   }
 
   // Enables the "SpellingServiceFeedback.Enabled" field trial.
   void EnableFieldTrial() {
     // The field trial is temporary.
     // TODO(rouslan): Remove the field trial. http://crbug.com/247726
     field_trial_list_.reset(
@@ skipping 527 matching lines @@
   AddPendingFeedback();
   feedback_->OnReceiveDocumentMarkers(kRendererProcessId,
                                       std::vector<uint32>());
   feedback_->StartFeedbackCollection();
   feedback_->OnReceiveDocumentMarkers(kRendererProcessId,
                                       std::vector<uint32>());
   EXPECT_FALSE(IsUploadingData());
 }
 
 }  // namespace spellcheck