The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/064bdb858e0ef62ba52bf6d4b3029329666142aa

commit 064bdb858e0ef62ba52bf6d4b3029329666142aa
Author: Xida Chen <xidachen@chromium.org>
Date: Tue Jun 19 01:26:52 2018

Remove WebGestureEvent::is_bubbled_from_child_frame

This CL removes that attributes. It also adds a gesture scroll bubbling
case to ensure that the behavior is correct.

Due to our previous temporary fix, we set |scrolling_touch_action_| to
Auto at GSB if it has no value. To prove that this CL is actually working,
we do:
PS#1: remove the set |scrolling_touch_action_| to Auto at GSB, and
the test will crash.
PS#2: Keep 1, add a line in CrossProcessFrameConnector::BubbleScrollEvent
which sets the |scrolling_touch_action_| to Auto. The test will pass.
PS#3: Keep the temporary fix which sets |scrolling_touch_action_| to
Auto at GSB.

TBR=pdr@chromium.org

Bug:  852835 ,  841270 
Change-Id: Ib33a39b4b0ef61e88645da427b920687bbcc80c9
Reviewed-on: https://chromium-review.googlesource.com/1101315
Commit-Queue: Xida Chen <xidachen@chromium.org>
Reviewed-by: Dave Tapuska <dtapuska@chromium.org>
Reviewed-by: Antoine Labour <piman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#568281}
[modify] https://crrev.com/064bdb858e0ef62ba52bf6d4b3029329666142aa/content/browser/frame_host/cross_process_frame_connector.cc
[modify] https://crrev.com/064bdb858e0ef62ba52bf6d4b3029329666142aa/content/browser/renderer_host/input/input_router.h
[modify] https://crrev.com/064bdb858e0ef62ba52bf6d4b3029329666142aa/content/browser/renderer_host/input/input_router_impl.cc
[modify] https://crrev.com/064bdb858e0ef62ba52bf6d4b3029329666142aa/content/browser/renderer_host/input/input_router_impl.h
[modify] https://crrev.com/064bdb858e0ef62ba52bf6d4b3029329666142aa/content/browser/renderer_host/input/touch_action_filter.cc
[modify] https://crrev.com/064bdb858e0ef62ba52bf6d4b3029329666142aa/content/browser/renderer_host/render_widget_host_unittest.cc
[modify] https://crrev.com/064bdb858e0ef62ba52bf6d4b3029329666142aa/content/browser/site_per_process_hit_test_browsertest.cc
[add] https://crrev.com/064bdb858e0ef62ba52bf6d4b3029329666142aa/content/test/data/frame_tree/page_with_pany_frame.html
[modify] https://crrev.com/064bdb858e0ef62ba52bf6d4b3029329666142aa/third_party/blink/public/platform/web_gesture_event.h