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

ui/compositor/test/in_process_context_factory.cc

Index: ui/compositor/test/in_process_context_factory.cc
diff --git a/ui/compositor/test/in_process_context_factory.cc b/ui/compositor/test/in_process_context_factory.cc
index 961f9b1085df6195a412afb47dead75c514973ba..819f9e83d4423ad5aa0bcad7770cb3d8c5cbcdcb 100644
--- a/ui/compositor/test/in_process_context_factory.cc
+++ b/ui/compositor/test/in_process_context_factory.cc
@@ -70,7 +70,7 @@ InProcessContextFactory::InProcessContextFactory()
       << "gfx::GLSurface::InitializeOneOffForTests()";
 
 #if defined(OS_CHROMEOS)
-  bool use_thread = !CommandLine::ForCurrentProcess()->HasSwitch(
+  bool use_thread = !base::CommandLine::ForCurrentProcess()->HasSwitch(
       switches::kUIDisableThreadedCompositing);
 #else
   bool use_thread = false;