Implement a runtime headless mode for Linux

ui/gfx/icc_profile_x11.cc

Index: ui/gfx/icc_profile_x11.cc
diff --git a/ui/gfx/icc_profile_x11.cc b/ui/gfx/icc_profile_x11.cc
index 21ae82c20cb20c8679da66272662a26c915e590c..8bcd51e6fb911783b81caf655680926491d7c5ce 100644
--- a/ui/gfx/icc_profile_x11.cc
+++ b/ui/gfx/icc_profile_x11.cc
@@ -9,8 +9,9 @@ extern "C" {
 #include <X11/Xlib.h>
 }
 
+#include "base/command_line.h"
 #include "ui/gfx/icc_profile.h"
-
+#include "ui/gfx/switches.h"
 #include "ui/gfx/x/x11_types.h"
 
 namespace gfx {
@@ -18,6 +19,8 @@ namespace gfx {
 // static
 ICCProfile ICCProfile::FromBestMonitor() {
   ICCProfile icc_profile;
+  if (base::CommandLine::ForCurrentProcess()->HasSwitch(switches::kHeadless))
+    return icc_profile;
   Atom property = XInternAtom(GetXDisplay(), "_ICC_PROFILE", true);
   if (property != None) {
     Atom prop_type = None;