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

chrome/browser/service_process/service_process_control_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/service_process/service_process_control.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "base/path_service.h"
@@ skipping 100 matching lines @@
                                            base::MessageLoop::QuitClosure());
   }
 
  private:
   base::ProcessHandle service_process_handle_;
 };
 
 class RealServiceProcessControlBrowserTest
       : public ServiceProcessControlBrowserTest {
  public:
-  void SetUpCommandLine(CommandLine* command_line) override {
+  void SetUpCommandLine(base::CommandLine* command_line) override {
     ServiceProcessControlBrowserTest::SetUpCommandLine(command_line);
     base::FilePath exe;
     PathService::Get(base::DIR_EXE, &exe);
 #if defined(OS_MACOSX)
     exe = exe.DirName().DirName().DirName();
 #endif
     exe = exe.Append(chrome::kHelperProcessExecutablePath);
     // Run chrome instead of browser_tests.exe.
     EXPECT_TRUE(base::PathExists(exe));
     command_line->AppendSwitchPath(switches::kBrowserSubprocessPath, exe);
@@ skipping 147 matching lines @@
   // Callback should not be called during GetHistograms call.
   EXPECT_CALL(*this, MockHistogramsCallback()).Times(0);
   // Wait for real callback by providing large timeout value.
   EXPECT_TRUE(ServiceProcessControl::GetInstance()->GetHistograms(
       base::Bind(&ServiceProcessControlBrowserTest::HistogramsCallback,
                 base::Unretained(this)),
       base::TimeDelta::FromHours(1)));
   EXPECT_CALL(*this, MockHistogramsCallback()).Times(1);
   content::RunMessageLoop();
 }