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-rw-r--r--chromium/ui/aura/env_observer.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/chromium/ui/aura/env_observer.h b/chromium/ui/aura/env_observer.h
index dcb3080a061..e9a3e7870aa 100644
--- a/chromium/ui/aura/env_observer.h
+++ b/chromium/ui/aura/env_observer.h
@@ -20,6 +20,9 @@ class AURA_EXPORT EnvObserver {
// Called when a WindowTreeHost is initialized.
virtual void OnHostInitialized(WindowTreeHost* host) {}
+ // Called before WindowTreeHost is destroyed.
+ virtual void OnHostDestroyed(WindowTreeHost* host) {}
+
// Called right before Env is destroyed.
virtual void OnWillDestroyEnv() {}