Replace deprecated base::NonThreadSafe in ui/gl in favor of ThreadChecker.

ui/gl/gl_surface_glx.cc

Index: ui/gl/gl_surface_glx.cc
diff --git a/ui/gl/gl_surface_glx.cc b/ui/gl/gl_surface_glx.cc
index 2543994be797942c7947560c7bb968d99ad5a636..4c0afc9d2c180f5398aca76931e5fc9677f57955 100644
--- a/ui/gl/gl_surface_glx.cc
+++ b/ui/gl/gl_surface_glx.cc
@@ -18,8 +18,8 @@ extern "C" {
 #include "base/single_thread_task_runner.h"
 #include "base/synchronization/cancellation_flag.h"
 #include "base/synchronization/lock.h"
-#include "base/threading/non_thread_safe.h"
 #include "base/threading/thread.h"
+#include "base/threading/thread_checker.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "base/time/time.h"
 #include "base/trace_event/trace_event.h"
@@ -171,7 +171,6 @@ class OMLSyncControlVSyncProvider : public SyncControlVSyncProvider {
 };
 
 class SGIVideoSyncThread : public base::Thread,
-                           public base::NonThreadSafe,
                            public base::RefCounted<SGIVideoSyncThread> {
  public:
   static scoped_refptr<SGIVideoSyncThread> Create() {
@@ -186,17 +185,19 @@ class SGIVideoSyncThread : public base::Thread,
   friend class base::RefCounted<SGIVideoSyncThread>;
 
   SGIVideoSyncThread() : base::Thread("SGI_video_sync") {
-    DCHECK(CalledOnValidThread());
+    DCHECK_CALLED_ON_VALID_THREAD(thread_checker_);
   }
 
   ~SGIVideoSyncThread() override {
-    DCHECK(CalledOnValidThread());
+    DCHECK_CALLED_ON_VALID_THREAD(thread_checker_);
     g_video_sync_thread = nullptr;
     Stop();
   }
 
   static SGIVideoSyncThread* g_video_sync_thread;
 
+  THREAD_CHECKER(thread_checker_);
+
   DISALLOW_COPY_AND_ASSIGN(SGIVideoSyncThread);
 };