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

content/browser/transition_request_manager_unittest.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 "content/browser/transition_request_manager.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/test/test_browser_thread_bundle.h"
 #include "net/http/http_response_headers.h"
 #include "net/http/http_util.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace content {
 
 class TransitionRequestManagerTest : public testing::Test {
  public:
   TransitionRequestManagerTest()
       : thread_bundle_(TestBrowserThreadBundle::IO_MAINLOOP) {
-    CommandLine::ForCurrentProcess()->AppendSwitch(
+    base::CommandLine::ForCurrentProcess()->AppendSwitch(
         switches::kEnableExperimentalWebPlatformFeatures);
   }
 
   ~TransitionRequestManagerTest() override {}
   TestBrowserThreadBundle thread_bundle_;
 };
 
 TEST_F(TransitionRequestManagerTest,
        ParseTransitionStylesheetsFromNullHeaders) {
   const GURL url("http://www.test.com/");
@@ skipping 133 matching lines @@
 
   // 6. Check that a navigation to http://wwww.unrelated.com now finds an entry.
   found = request_manager->GetPendingTransitionRequest(
       render_process_id, render_frame_id, unrelated_dot_com_url,
       &transition_layer_data);
   ASSERT_TRUE(found);
   EXPECT_TRUE(transition_layer_data.css_selector == fallback_css_selector);
 }
 
 }  // namespace content