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

chrome/browser/ui/cocoa/extensions/extension_installed_bubble_controller_unittest.mm

 // 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.
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/basictypes.h"
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
@@ skipping 37 matching lines @@
 namespace keys = extensions::manifest_keys;
 
 class ExtensionInstalledBubbleControllerTest : public CocoaProfileTest {
 
  public:
   virtual void SetUp() {
     CocoaProfileTest::SetUp();
     ASSERT_TRUE(browser());
     window_ = browser()->window()->GetNativeWindow();
     icon_ = LoadTestIcon();
-    CommandLine command_line(CommandLine::NO_PROGRAM);
+    base::CommandLine command_line(base::CommandLine::NO_PROGRAM);
     extension_service_ = static_cast<extensions::TestExtensionSystem*>(
         extensions::ExtensionSystem::Get(profile()))->CreateExtensionService(
             &command_line, base::FilePath(), false);
   }
 
   // Load test icon from extension test directory.
   SkBitmap LoadTestIcon() {
     base::FilePath path;
     PathService::Get(chrome::DIR_TEST_DATA, &path);
     path = path.AppendASCII("extensions").AppendASCII("icon1.png");
@@ skipping 233 matching lines @@
   int minHeight = extension_installed_bubble::kIconSize +
     (2 * extension_installed_bubble::kOuterVerticalMargin);
   EXPECT_GT(height, minHeight);
 
   // Make sure the "show me" link is visible.
   EXPECT_FALSE([[controller appInstalledShortcutLink] isHidden]);
 
   [controller close];
 }