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

chrome/browser/ui/views/ash/tab_scrubber_browsertest.cc

 // Copyright (c) 2012 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 "chrome/browser/ui/views/ash/tab_scrubber.h"
 
 #include "ash/display/event_transformation_handler.h"
 #include "ash/shell.h"
 #include "base/command_line.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 20 matching lines @@
 
 namespace {
 
 class TabScrubberTest : public InProcessBrowserTest,
                         public TabStripModelObserver {
  public:
   TabScrubberTest()
       : target_index_(-1) {
   }
 
-  void SetUpCommandLine(CommandLine* command_line) override {
+  void SetUpCommandLine(base::CommandLine* command_line) override {
 #if defined(OS_CHROMEOS)
     command_line->AppendSwitch(chromeos::switches::kNaturalScrollDefault);
 #endif
     command_line->AppendSwitch(switches::kOpenAsh);
   }
 
   void SetUpOnMainThread() override {
     TabScrubber::GetInstance()->set_activation_delay(0);
 
     // Disable external monitor scaling of coordinates.
@@ skipping 359 matching lines @@
 IN_PROC_BROWSER_TEST_F(TabScrubberTest, CloseBrowser) {
   AddTabs(browser(), 1);
 
   SendScrubEvent(browser(), 0);
   EXPECT_TRUE(TabScrubber::GetInstance()->IsActivationPending());
   browser()->window()->Close();
   EXPECT_FALSE(TabScrubber::GetInstance()->IsActivationPending());
 }
 
 #endif  // defined(OS_CHROMEOS)