Use GetXDisplay() instead of XOpenDisplay() in IdleQueryLinux.

chrome/browser/idle_query_linux.cc

Index: chrome/browser/idle_query_linux.cc
diff --git a/chrome/browser/idle_query_linux.cc b/chrome/browser/idle_query_linux.cc
index 41d4abaaa86dc1cbaaf4a611874c64a61886aff4..dfa2fb5fa37333bb93646078f16c9e92ee3e634b 100644
--- a/chrome/browser/idle_query_linux.cc
+++ b/chrome/browser/idle_query_linux.cc
@@ -4,8 +4,8 @@
 
 #include "chrome/browser/idle_query_linux.h"
 
-#include <X11/Xlib.h>
 #include <X11/extensions/scrnsaver.h>
+#include "ui/base/x/x11_util.h"
 
 namespace browser {
 
@@ -14,8 +14,8 @@ class IdleData {
   IdleData() {
     int event_base;
     int error_base;
-    display = XOpenDisplay(NULL);
-    if (XScreenSaverQueryExtension(display, &event_base, &error_base)) {
+    if (XScreenSaverQueryExtension(ui::GetXDisplay(), &event_base,
+                                   &error_base)) {
       mit_info = XScreenSaverAllocInfo();
     } else {
       mit_info = NULL;
@@ -23,16 +23,11 @@ class IdleData {
   }
 
   ~IdleData() {
-    if (display) {
-      XCloseDisplay(display);
-      display = NULL;
-    }
     if (mit_info)
       XFree(mit_info);
   }
 
   XScreenSaverInfo *mit_info;
-  Display *display;
 };
 
 IdleQueryLinux::IdleQueryLinux() : idle_data_(new IdleData()) {}
@@ -40,11 +35,11 @@ IdleQueryLinux::IdleQueryLinux() : idle_data_(new IdleData()) {}
 IdleQueryLinux::~IdleQueryLinux() {}
 
 int IdleQueryLinux::IdleTime() {
-  if (!idle_data_->mit_info || !idle_data_->display)
+  if (!idle_data_->mit_info)
     return 0;
 
-  if (XScreenSaverQueryInfo(idle_data_->display,
-                            RootWindow(idle_data_->display, 0),
+  if (XScreenSaverQueryInfo(ui::GetXDisplay(),
+                            RootWindow(ui::GetXDisplay(), 0),
                             idle_data_->mit_info)) {
     return (idle_data_->mit_info->idle) / 1000;
   } else {