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

content/browser/transition_browsertest.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/bind.h"
 #include "base/command_line.h"
 #include "content/browser/loader/cross_site_resource_handler.h"
 #include "content/browser/loader/resource_dispatcher_host_impl.h"
 #include "content/browser/loader/resource_request_info_impl.h"
 #include "content/browser/transition_request_manager.h"
 #include "content/browser/web_contents/web_contents_impl.h"
 #include "content/public/browser/web_contents_observer.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/test/browser_test_utils.h"
 #include "content/public/test/content_browser_test.h"
 #include "content/public/test/content_browser_test_utils.h"
 #include "content/public/test/test_utils.h"
 #include "content/shell/browser/shell.h"
 #include "content/shell/browser/shell_resource_dispatcher_host_delegate.h"
 #include "net/test/embedded_test_server/embedded_test_server.h"
 #include "net/url_request/url_request.h"
 
 namespace content {
 
 class TransitionBrowserTest : public ContentBrowserTest {
  public:
   TransitionBrowserTest() {}
 
-  void SetUpCommandLine(CommandLine* command_line) override {
+  void SetUpCommandLine(base::CommandLine* command_line) override {
     command_line->AppendSwitch(
         switches::kEnableExperimentalWebPlatformFeatures);
   }
 
  private:
   DISALLOW_COPY_AND_ASSIGN(TransitionBrowserTest);
 };
 
 class TransitionBrowserTestObserver
     : public WebContentsObserver,
@@ skipping 142 matching lines @@
   ResourceDispatcherHost::Get()->SetDelegate(observer.get());
   observer->set_pending_transition_request(true);
 
   NavigateToURL(shell(), embedded_test_server()->GetURL("/title1.html"));
   WaitForLoadStop(shell()->web_contents());
 
   EXPECT_TRUE(observer->did_clear_data());
 }
 
 }  // namespace content