Final(?) eradications of GDK / GTK from the GPU process.

base/message_pump_gtk.cc

Index: base/message_pump_gtk.cc
===================================================================
--- base/message_pump_gtk.cc	(revision 132496)
+++ base/message_pump_gtk.cc	(working copy)
@@ -88,7 +88,13 @@
 // static
 Display* MessagePumpGtk::GetDefaultXDisplay() {

[darin (slow to review), 2012/04/23 16:52:57]

why do we need to involve a class named *Gtk in code that should never be using
GTK?  can you say more about why this change is needed?

   static GdkDisplay* display = gdk_display_get_default();
-  return display ? GDK_DISPLAY_XDISPLAY(display) : NULL;
+  if (!display) {
+    // GTK / GDK has not been initialized, which is a decision we wish to
+    // support, for example for the GPU process.
+    static Display* xdisplay = XOpenDisplay(NULL);
+    return xdisplay;
+  }
+  return GDK_DISPLAY_XDISPLAY(display);
 }
 
 void MessagePumpGtk::WillProcessEvent(GdkEvent* event) {