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

device/test/usb_test_gadget_impl.cc

Index: device/test/usb_test_gadget_impl.cc
diff --git a/device/test/usb_test_gadget_impl.cc b/device/test/usb_test_gadget_impl.cc
index 0e8aa7477426388fb941e1be62b9676b2e51a42e..4a69265897315a18dfde4b0de105d2859ded8ced 100644
--- a/device/test/usb_test_gadget_impl.cc
+++ b/device/test/usb_test_gadget_impl.cc
@@ -123,7 +123,7 @@ class UsbTestGadgetImpl : public UsbTestGadget {
 }  // namespace
 
 bool UsbTestGadget::IsTestEnabled() {
-  base::CommandLine* command_line = CommandLine::ForCurrentProcess();
+  base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
   return command_line->HasSwitch(kCommandLineSwitch);
 }