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

chrome/browser/ui/cocoa/profiles/avatar_button_controller_unittest.mm

 // 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.
 
 #import "chrome/browser/ui/cocoa/profiles/avatar_button_controller.h"
 
 #include "base/command_line.h"
 #include "base/mac/scoped_nsobject.h"
 #include "base/strings/sys_string_conversions.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 14 matching lines @@
 #include "ui/base/resource/resource_bundle.h"
 
 // Defined in the AvatarButtonController implementation.
 @interface AvatarButtonController (ExposedForTesting)
 - (void)updateErrorStatus:(BOOL)hasError;
 @end
 
 class AvatarButtonControllerTest : public CocoaProfileTest {
  public:
   virtual void SetUp() override {
-    switches::EnableNewAvatarMenuForTesting(CommandLine::ForCurrentProcess());
+    switches::EnableNewAvatarMenuForTesting(
+        base::CommandLine::ForCurrentProcess());
     DCHECK(profiles::IsMultipleProfilesEnabled());
 
     CocoaProfileTest::SetUp();
     ASSERT_TRUE(browser());
 
     controller_.reset(
         [[AvatarButtonController alloc] initWithBrowser:browser()]);
   }
 
   virtual void TearDown() override {
@@ skipping 53 matching lines @@
 
   [button() performClick:button()];
   EXPECT_EQ(menu, [controller() menuController]);
 
   // Do not animate out because that is hard to test around.
   static_cast<InfoBubbleWindow*>(menu.window).allowedAnimations =
       info_bubble::kAnimateNone;
   [menu close];
   EXPECT_FALSE([controller() menuController]);
 }