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

ui/events/gesture_detection/gesture_configuration_aura.cc

Index: ui/events/gesture_detection/gesture_configuration_aura.cc
diff --git a/ui/events/gesture_detection/gesture_configuration_aura.cc b/ui/events/gesture_detection/gesture_configuration_aura.cc
index 55616889587a0557464500302e126e8675686e73..5608392345aee3876ceff69fff42313a4cd0b850 100644
--- a/ui/events/gesture_detection/gesture_configuration_aura.cc
+++ b/ui/events/gesture_detection/gesture_configuration_aura.cc
@@ -25,9 +25,10 @@ class GestureConfigurationAura : public GestureConfiguration {
     set_gesture_begin_end_types_enabled(true);
     set_min_gesture_bounds_length(default_radius());
     set_min_pinch_update_span_delta(
-        CommandLine::ForCurrentProcess()->HasSwitch(
+        base::CommandLine::ForCurrentProcess()->HasSwitch(
             switches::kCompensateForUnstablePinchZoom)
-            ? 5 : 0);
+            ? 5
+            : 0);
     set_min_scaling_touch_major(default_radius() * 2);
     set_velocity_tracker_strategy(VelocityTracker::Strategy::LSQ2_RESTRICTED);
     set_span_slop(max_touch_move_in_pixels_for_click() * 2);