Quick rename of ax_modes.h to ax_mode.h

The enum defined in the file is AXMode, so it's more
logical this way.

Uploading this required making a quick fix to a
PRESUBMIT.py script too.

BUG: none
[email protected]

Change-Id: Ic6ef5574645761767e9277e3d34568725deb383a
Reviewed-on: https://chromium-review.googlesource.com/1207353
Reviewed-by: Dominic Mazzoni <[email protected]>
Reviewed-by: Alice Boxhall <[email protected]>
Commit-Queue: Dominic Mazzoni <[email protected]>
Cr-Commit-Position: refs/heads/master@{#589035}
diff --git a/content/public/browser/web_contents.h b/content/public/browser/web_contents.h
index 786eecf..73a83f9 100644
--- a/content/public/browser/web_contents.h
+++ b/content/public/browser/web_contents.h
@@ -33,7 +33,7 @@
 #include "third_party/blink/public/common/frame/sandbox_flags.h"
 #include "third_party/blink/public/mojom/loader/pause_subresource_loading_handle.mojom.h"
 #include "third_party/skia/include/core/SkColor.h"
-#include "ui/accessibility/ax_modes.h"
+#include "ui/accessibility/ax_mode.h"
 #include "ui/accessibility/ax_tree_update.h"
 #include "ui/base/window_open_disposition.h"
 #include "ui/gfx/geometry/rect.h"