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

chrome/browser/service_process/service_process_control_browsertest.cc

Index: chrome/browser/service_process/service_process_control_browsertest.cc
diff --git a/chrome/browser/service_process/service_process_control_browsertest.cc b/chrome/browser/service_process/service_process_control_browsertest.cc
index 7d0fce397b91c6a704e3f41023ce22f12bea11d2..eb934c85a7a853d4e6ae91dc41776dd0cb4d088d 100644
--- a/chrome/browser/service_process/service_process_control_browsertest.cc
+++ b/chrome/browser/service_process/service_process_control_browsertest.cc
@@ -118,7 +118,7 @@ class ServiceProcessControlBrowserTest
 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);