Index: chrome/browser/device_orientation/provider.h |
diff --git a/chrome/browser/device_orientation/provider.h b/chrome/browser/device_orientation/provider.h |
index f32b0f6b527004210c2713c2bca3f6dd233d2a60..c6b1b7aba68fc2e9a32379aee764111bf1f92588 100644 |
--- a/chrome/browser/device_orientation/provider.h |
+++ b/chrome/browser/device_orientation/provider.h |
@@ -33,6 +33,8 @@ class Provider : public base::RefCountedThreadSafe<Provider> { |
// injected object's reference count. |
static void SetInstanceForTests(Provider* provider); |
+ // Note: AddObserver may call back synchronously to the observer with |
+ // orientation data. |
virtual void AddObserver(Observer* observer) = 0; |
virtual void RemoveObserver(Observer* observer) = 0; |