Remove use of base::Bind from extensions/docs

Bug: 1007786
Change-Id: I7b3ce7e78c7b15407e8e8f5826d94baae4f946d7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2076858Reviewed-by: Reilly Grant <reillyg@chromium.org>
Commit-Queue: Reilly Grant <reillyg@chromium.org>
Auto-Submit: Alan Cutter <alancutter@chromium.org>
Cr-Commit-Position: refs/heads/master@{#745144}

extensions/docs/api_functions.md

@@ -172,7 +172,7 @@ ExtensionFunction::ResponseAction GizmoFrobulateFunction::Run() {
       params->cycles,
       // Note that |this| is refcounted, so binding automatically adds a
       // reference.
-      base::Bind(&GizmoFrobulateFunction::OnFrobulated, this));
+      base::BindOnce(&GizmoFrobulateFunction::OnFrobulated, this));
 
   // Note: Since we are returning RespondLater() here, it is required that
   // Frobulate() did not call the callback synchronously (in which case,