Fixing the bug, that caused UI to hang after unsupported device was inserted.

chrome/browser/idle_linux.cc

Index: chrome/browser/idle_linux.cc
diff --git a/chrome/browser/idle_linux.cc b/chrome/browser/idle_linux.cc
index eba79585d54d76b4710fd933b7066d9936a2d006..dacde8bae13342afb149580e7c78ee1b25c91c19 100644
--- a/chrome/browser/idle_linux.cc
+++ b/chrome/browser/idle_linux.cc
@@ -64,16 +64,10 @@ bool ScreensaverWindowExists() {
 }
 
 void CalculateIdleState(unsigned int idle_threshold, IdleCallback notify) {
-  // Usually the screensaver is used to lock the screen, so we do not need to
-  // check if the workstation is locked.
-  gdk_error_trap_push();
-  bool result = ScreensaverWindowExists();
-  bool got_error = gdk_error_trap_pop();
-  if (result && !got_error) {
+  if (CheckIdleStateIsLocked()) {
     notify.Run(IDLE_STATE_LOCKED);
     return;
   }
-
   browser::IdleQueryLinux idle_query;
   unsigned int idle_time = idle_query.IdleTime();
   if (idle_time >= idle_threshold)
@@ -81,3 +75,12 @@ void CalculateIdleState(unsigned int idle_threshold, IdleCallback notify) {
   else
     notify.Run(IDLE_STATE_ACTIVE);
 }
+
+bool CheckIdleStateIsLocked() {
+  // Usually the screensaver is used to lock the screen, so we do not need to
+  // check if the workstation is locked.
+  gdk_error_trap_push();
+  bool result = ScreensaverWindowExists();
+  bool got_error = gdk_error_trap_pop();
+  return result && !got_error;
+}