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

extensions/browser/api/test/test_api.cc

Index: extensions/browser/api/test/test_api.cc
diff --git a/extensions/browser/api/test/test_api.cc b/extensions/browser/api/test/test_api.cc
index 4faaa0335e8fbdaf6dd6b25b4d0dda72fe973c2d..23de740ebafd69114a6acefd1222bc76b6795f5b 100644
--- a/extensions/browser/api/test/test_api.cc
+++ b/extensions/browser/api/test/test_api.cc
@@ -38,7 +38,7 @@ namespace WaitForRoundTrip = core_api::test::WaitForRoundTrip;
 TestExtensionFunction::~TestExtensionFunction() {}
 
 bool TestExtensionFunction::RunSync() {
-  if (!CommandLine::ForCurrentProcess()->HasSwitch(switches::kTestType)) {
+  if (!base::CommandLine::ForCurrentProcess()->HasSwitch(switches::kTestType)) {
     error_ = kNotTestProcessError;
     return false;
   }