"It was all just a dream": First use in film?

[Walloon]

From the closing chapter of Alice’s Adventures in Wonderland:

Oh, I've had such a curious dream!' said Alice, and she told her sister, as well as she could remember them, all these strange Adventures of hers that you have just been reading about; and when she had finished, her sister kissed her, and said, It WAS a curious dream, dear, certainly: but now run in to your tea; it’s getting late.’ So Alice got up and ran off, thinking while she ran, as well she might, what a wonderful dream it had been.

[Otto]

Another early example: A Florida Enchantment (1914). Adapted from a Broadway play; I don’t know if the “all a dream” ending was in the play as well.

[Rilchiam]

Miracle Mile left me with the impression that it was originally meant to end with IWAAD. I won’t spoil anything, but suffice to say that there’s a definite dreamlike aspect to the events, and the sequence in which they occur. It wouldn’t have been illogical to end with IWAAD, but somewhere along the line, someone might have said, “Hey, let’s not wimp out; let’s have it really happen.”