[headless] Fix screenshots with gpu enabled.

content/browser/compositor/gpu_process_transport_factory.cc

Index: content/browser/compositor/gpu_process_transport_factory.cc
diff --git a/content/browser/compositor/gpu_process_transport_factory.cc b/content/browser/compositor/gpu_process_transport_factory.cc
index 4c0f9ee66edc593f0d353b984bf76a6e1bad82a4..bf4a6535715b6ac087224d63ae12de77776794b7 100644
--- a/content/browser/compositor/gpu_process_transport_factory.cc
+++ b/content/browser/compositor/gpu_process_transport_factory.cc
@@ -267,10 +267,6 @@ CreateOverlayCandidateValidator(gfx::AcceleratedWidget widget) {
 }
 
 static bool ShouldCreateGpuCompositorFrameSink(ui::Compositor* compositor) {
-  base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
-  if (command_line->HasSwitch(switches::kHeadless))
-    return false;
-
 #if defined(OS_CHROMEOS)
   // Software fallback does not happen on Chrome OS.
   return true;