linux_aura: Bail early if we can't connect to the X11 server.

ui/gfx/x/x11_types.cc

Index: ui/gfx/x/x11_types.cc
diff --git a/ui/gfx/x/x11_types.cc b/ui/gfx/x/x11_types.cc
index 6c4f62db989be3c6946efea4119f51c2532f8ff1..54a0816c65236121dd6852a21a87777f03b43efb 100644
--- a/ui/gfx/x/x11_types.cc
+++ b/ui/gfx/x/x11_types.cc
@@ -6,17 +6,29 @@
 
 #include <X11/Xlib.h>
 
+#include "base/command_line.h"
 #include "base/message_loop/message_loop.h"
+#include "ui/gfx/x/x11_switches.h"
 
 namespace gfx {
 
 XDisplay* GetXDisplay() {
   static XDisplay* display = NULL;
   if (!display)
-    display = XOpenDisplay(NULL);
+    display = OpenNewXDisplay();
   return display;
 }
 
+XDisplay* OpenNewXDisplay() {
+#if defined(OS_CHROMEOS)

[Ami GONE FROM CHROMIUM, 2014/05/29 00:28:43]

CHECK cmd line value is not present, since you ignore it?

[Elliot Glaysher, 2014/05/29 00:35:22]

I don't think I can do this because switches::kX11Display isn't compiled in on
chromoes.

+  return XOpenDisplay(NULL);
+#else
+  std::string display_str = base::CommandLine::ForCurrentProcess()->
+                            GetSwitchValueASCII(switches::kX11Display);
+  return XOpenDisplay(display_str.empty() ? NULL : display_str.c_str());
+#endif
+}
+
 void PutARGBImage(XDisplay* display,
                   void* visual, int depth,
                   XID pixmap, void* pixmap_gc,