Update header includes for /base/functional in /content

bind.h, callback.h, callback_forward.h, and callback_helpers.h
moved into /base/functional/. Update the include paths to
directly include them in their new location.

Bug: 1364441
Change-Id: I32ec425b9c0e52ec4b50047bf3290fecc5c905ff
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4148554
Reviewed-by: Daniel Cheng <[email protected]>
Auto-Submit: Avi Drissman <[email protected]>
Owners-Override: Avi Drissman <[email protected]>
Owners-Override: Daniel Cheng <[email protected]>
Commit-Queue: Daniel Cheng <[email protected]>
Cr-Commit-Position: refs/heads/main@{#1091567}
diff --git a/content/public/browser/web_contents.h b/content/public/browser/web_contents.h
index 1fd1561..80bafeb 100644
--- a/content/public/browser/web_contents.h
+++ b/content/public/browser/web_contents.h
@@ -12,8 +12,8 @@
 #include <string>
 #include <vector>
 
-#include "base/callback_forward.h"
-#include "base/callback_helpers.h"
+#include "base/functional/callback_forward.h"
+#include "base/functional/callback_helpers.h"
 #include "base/functional/function_ref.h"
 #include "base/location.h"
 #include "base/memory/raw_ptr.h"