[C++11 Allowed Features] Declares a type-safe null pointer converting from NULL to nullptr [part-…

cc/trees/thread_proxy.cc

Index: cc/trees/thread_proxy.cc
diff --git a/cc/trees/thread_proxy.cc b/cc/trees/thread_proxy.cc
index 1c75993681150191623db568a75e03e34ec3830b..ad9ba7e20eca7b8c29445a2842e6f25f3c3e91bc 100644
--- a/cc/trees/thread_proxy.cc
+++ b/cc/trees/thread_proxy.cc
@@ -101,9 +101,9 @@ ThreadProxy::CompositorThreadOnly::CompositorThreadOnly(
     int layer_tree_host_id,
     RenderingStatsInstrumentation* rendering_stats_instrumentation)
     : layer_tree_host_id(layer_tree_host_id),
-      contents_texture_manager(NULL),
-      commit_completion_event(NULL),
-      completion_event_for_commit_held_on_tree_activation(NULL),
+      contents_texture_manager(nullptr),
+      commit_completion_event(nullptr),
+      completion_event_for_commit_held_on_tree_activation(nullptr),
       next_frame_is_newly_committed_frame(false),
       inside_draw(false),
       input_throttled_until_commit(false),
@@ -621,7 +621,7 @@ void ThreadProxy::Stop() {
   }
 
   main().weak_factory.InvalidateWeakPtrs();
-  blocked_main().layer_tree_host = NULL;
+  blocked_main().layer_tree_host = nullptr;
   main().started = false;
 }
 
@@ -979,10 +979,10 @@ void ThreadProxy::ScheduledActionCommit() {
     TRACE_EVENT_INSTANT0("cc", "HoldCommit", TRACE_EVENT_SCOPE_THREAD);
     impl().completion_event_for_commit_held_on_tree_activation =
         impl().commit_completion_event;
-    impl().commit_completion_event = NULL;
+    impl().commit_completion_event = nullptr;
   } else {
     impl().commit_completion_event->Signal();
-    impl().commit_completion_event = NULL;
+    impl().commit_completion_event = nullptr;
   }
 
   // Delay this step until afer the main thread has been released as it's
@@ -1245,7 +1245,7 @@ void ThreadProxy::LayerTreeHostClosedOnImplThread(CompletionEvent* completion) {
   // we should moved the notifier (and RenewTreePriority) to LTHI. See
   // crbug.com/411972
   impl().smoothness_priority_expiration_notifier.Cancel();
-  impl().contents_texture_manager = NULL;
+  impl().contents_texture_manager = nullptr;
   completion->Signal();
 }
 
@@ -1379,7 +1379,7 @@ void ThreadProxy::DidActivateSyncTree() {
         "cc", "ReleaseCommitbyActivation", TRACE_EVENT_SCOPE_THREAD);
     DCHECK(impl().layer_tree_host_impl->settings().impl_side_painting);
     impl().completion_event_for_commit_held_on_tree_activation->Signal();
-    impl().completion_event_for_commit_held_on_tree_activation = NULL;
+    impl().completion_event_for_commit_held_on_tree_activation = nullptr;
   }
 
   UpdateBackgroundAnimateTicking();