Revert "Remove code to store the last popup transiently in WebFrameWidgetImpl"

This reverts commit 573f46751824b8dcfbec675291eacc8c581ae441.

Reason for revert: Seems to be causing EffectiveTouchActionPropagatesAcrossNestedFrames to fail https://logs.chromium.org/logs/chromium/buildbucket/cr-buildbucket.appspot.com/8927388648425983952/+/steps/content_browsertests_on_Intel_GPU_on_Mac_on_Mac-10.12.6/0/logs/SitePerProcessBrowserTouchActionTest.EffectiveTouchActionPropagatesAcrossNestedFrames/0

Original change's description:
> Remove code to store the last popup transiently in WebFrameWidgetImpl
> 
> This code was copied over from WebViewImpl when adding the HidePopups
> call in order to have a pinch zoom or scroll tap outside the current
> popup in a non-main-frame-local-rooted iframe hide the current popup.
> 
> This is modifying state on WebViewImpl meant to track between TapDown
> and Tap, to avoid the Tap showing a popup that was hidden by TapDown.
> 
> WebFrameWidgetImpl does not show popups on Tap, and if it did, it
> should track this transient state locally not on WebViewImpl.
> 
> Also remove the undocumented FALLTHROUGH which was not explained
> in 671732 as it now goes to nothing.
> 
> R=​dcheng@chromium.org
> 
> Change-Id: I9d67539cf0afbb9db239b73bf83418e1a877e6db
> Bug: 912193, 671732
> Reviewed-on: https://chromium-review.googlesource.com/c/1372539
> Reviewed-by: James MacLean <wjmaclean@chromium.org>
> Reviewed-by: Daniel Cheng <dcheng@chromium.org>
> Commit-Queue: danakj <danakj@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#615708}

TBR=danakj@chromium.org,dcheng@chromium.org,wjmaclean@chromium.org

Change-Id: Ifddbb605fc6165505774105d5618d57b62e3159c
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 912193, 671732
Reviewed-on: https://chromium-review.googlesource.com/c/1372110
Reviewed-by: Alice Boxhall <aboxhall@chromium.org>
Commit-Queue: Alice Boxhall <aboxhall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#615783}
1 file changed