Changed InputAckHandler to InputDispositionHandler

We would like to be able to use InputAckHandler, |ack_handler_|,
in the case that WhiteListedTouchActions are received.
Changing InputAckHandler to InputDispositionHandler will provide a
better name for OnSetWhiteListedTouchAction logic that will be added
in a later CL. In the later CL, InputDispositionHandler will have an
OnSetWhiteListedTouchAction function that will call into the logic of
determining if a current gesture event is allowed.

[email protected]

Bug: 716668
Change-Id: Ib74f5b7062f5521b3a0e158b8ddb4732de4e1c3a
Reviewed-on: https://chromium-review.googlesource.com/589068
Commit-Queue: Hayley Ferr <[email protected]>
Reviewed-by: Timothy Dresser <[email protected]>
Cr-Commit-Position: refs/heads/master@{#490048}
diff --git a/content/browser/BUILD.gn b/content/browser/BUILD.gn
index 9549927..1b8211a8 100644
--- a/content/browser/BUILD.gn
+++ b/content/browser/BUILD.gn
@@ -1145,9 +1145,9 @@
     "renderer_host/frame_sink_provider_impl.h",
     "renderer_host/input/gesture_event_queue.cc",
     "renderer_host/input/gesture_event_queue.h",
-    "renderer_host/input/input_ack_handler.h",
     "renderer_host/input/input_device_change_observer.cc",
     "renderer_host/input/input_device_change_observer.h",
+    "renderer_host/input/input_disposition_handler.h",
     "renderer_host/input/input_router.h",
     "renderer_host/input/input_router_client.h",
     "renderer_host/input/input_router_config_helper.cc",