Make OverscrollCustomization as experimental

Bug: 907601
Change-Id: I88d5682df5488f2030a1f5ef18118d3b3ba18008
Reviewed-on: https://chromium-review.googlesource.com/c/1486154Reviewed-by: Sahel Sharify <sahel@chromium.org>
Reviewed-by: David Bokan <bokan@chromium.org>
Commit-Queue: Navid Zolghadr <nzolghadr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#636499}

third_party/blink/renderer/platform/runtime_enabled_features.json5

@@ -989,6 +989,7 @@
     {
       name: "OverscrollCustomization",
       settable_from_internals: true,
+      status: "experimental",
     },
     // This feature refers to the API that delivers notifications to pages on
     // lifecycle state changes.

third_party/blink/web_tests/fast/dom/Window/property-access-on-cached-window-after-frame-navigated-expected.txt

@@ -131,6 +131,7 @@ PASS oldChildWindow.onmouseup is newChildWindow.onmouseup
 PASS oldChildWindow.onmousewheel is newChildWindow.onmousewheel
 PASS oldChildWindow.onoffline is newChildWindow.onoffline
 PASS oldChildWindow.ononline is newChildWindow.ononline
+PASS oldChildWindow.onoverscroll is newChildWindow.onoverscroll
 PASS oldChildWindow.onpagehide is newChildWindow.onpagehide
 PASS oldChildWindow.onpageshow is newChildWindow.onpageshow
 PASS oldChildWindow.onpause is newChildWindow.onpause
@@ -153,6 +154,7 @@ PASS oldChildWindow.onrejectionhandled is newChildWindow.onrejectionhandled
 PASS oldChildWindow.onreset is newChildWindow.onreset
 PASS oldChildWindow.onresize is newChildWindow.onresize
 PASS oldChildWindow.onscroll is newChildWindow.onscroll
+PASS oldChildWindow.onscrollend is newChildWindow.onscrollend
 PASS oldChildWindow.onsearch is newChildWindow.onsearch
 PASS oldChildWindow.onseeked is newChildWindow.onseeked
 PASS oldChildWindow.onseeking is newChildWindow.onseeking

third_party/blink/web_tests/fast/dom/Window/property-access-on-cached-window-after-frame-removed-and-gced-expected.txt

@@ -96,6 +96,7 @@ PASS childWindow.onmouseup is null
 PASS childWindow.onmousewheel is null
 PASS childWindow.onoffline is null
 PASS childWindow.ononline is null
+PASS childWindow.onoverscroll is null
 PASS childWindow.onpagehide is null
 PASS childWindow.onpageshow is null
 PASS childWindow.onpause is null
@@ -118,6 +119,7 @@ PASS childWindow.onrejectionhandled is null
 PASS childWindow.onreset is null
 PASS childWindow.onresize is null
 PASS childWindow.onscroll is null
+PASS childWindow.onscrollend is null
 PASS childWindow.onsearch is null
 PASS childWindow.onseeked is null
 PASS childWindow.onseeking is null

third_party/blink/web_tests/fast/dom/Window/property-access-on-cached-window-after-frame-removed-expected.txt

@@ -96,6 +96,7 @@ PASS childWindow.onmouseup is null
 PASS childWindow.onmousewheel is null
 PASS childWindow.onoffline is null
 PASS childWindow.ononline is null
+PASS childWindow.onoverscroll is null
 PASS childWindow.onpagehide is null
 PASS childWindow.onpageshow is null
 PASS childWindow.onpause is null
@@ -118,6 +119,7 @@ PASS childWindow.onrejectionhandled is null
 PASS childWindow.onreset is null
 PASS childWindow.onresize is null
 PASS childWindow.onscroll is null
+PASS childWindow.onscrollend is null
 PASS childWindow.onsearch is null
 PASS childWindow.onseeked is null
 PASS childWindow.onseeking is null

third_party/blink/web_tests/webexposed/element-instance-property-listing-expected.txt

@@ -215,6 +215,7 @@ namespace http://www.w3.org/1999/xhtml
     property onmouseover
     property onmouseup
     property onmousewheel
+    property onoverscroll
     property onpaste
     property onpause
     property onplay
@@ -233,6 +234,7 @@ namespace http://www.w3.org/1999/xhtml
     property onreset
     property onresize
     property onscroll
+    property onscrollend
     property onsearch
     property onseeked
     property onseeking
@@ -1378,6 +1380,7 @@ namespace http://www.w3.org/2000/svg
     property onmouseover
     property onmouseup
     property onmousewheel
+    property onoverscroll
     property onpaste
     property onpause
     property onplay
@@ -1396,6 +1399,7 @@ namespace http://www.w3.org/2000/svg
     property onreset
     property onresize
     property onscroll
+    property onscrollend
     property onsearch
     property onseeked
     property onseeking

third_party/blink/web_tests/webexposed/global-interface-listing-expected.txt

@@ -1614,6 +1614,7 @@ interface Document : Node
     getter onmouseover
     getter onmouseup
     getter onmousewheel
+    getter onoverscroll
     getter onpaste
     getter onpause
     getter onplay
@@ -1636,6 +1637,7 @@ interface Document : Node
     getter onresize
     getter onresume
     getter onscroll
+    getter onscrollend
     getter onsearch
     getter onsecuritypolicyviolation
     getter onseeked
@@ -1802,6 +1804,7 @@ interface Document : Node
     setter onmouseover
     setter onmouseup
     setter onmousewheel
+    setter onoverscroll
     setter onpaste
     setter onpause
     setter onplay
@@ -1824,6 +1827,7 @@ interface Document : Node
     setter onresize
     setter onresume
     setter onscroll
+    setter onscrollend
     setter onsearch
     setter onsecuritypolicyviolation
     setter onseeked
@@ -2701,6 +2705,7 @@ interface HTMLElement : Element
     getter onmouseover
     getter onmouseup
     getter onmousewheel
+    getter onoverscroll
     getter onpaste
     getter onpause
     getter onplay
@@ -2719,6 +2724,7 @@ interface HTMLElement : Element
     getter onreset
     getter onresize
     getter onscroll
+    getter onscrollend
     getter onseeked
     getter onseeking
     getter onselect
@@ -2805,6 +2811,7 @@ interface HTMLElement : Element
     setter onmouseover
     setter onmouseup
     setter onmousewheel
+    setter onoverscroll
     setter onpaste
     setter onpause
     setter onplay
@@ -2823,6 +2830,7 @@ interface HTMLElement : Element
     setter onreset
     setter onresize
     setter onscroll
+    setter onscrollend
     setter onseeked
     setter onseeking
     setter onselect
@@ -5121,6 +5129,11 @@ interface OverconstrainedError
     getter message
     getter name
     method constructor
+interface OverscrollEvent : Event
+    attribute @@toStringTag
+    getter deltaX
+    getter deltaY
+    method constructor
 interface PageTransitionEvent : Event
     attribute @@toStringTag
     getter persisted
@@ -6176,6 +6189,7 @@ interface SVGElement : Element
     getter onmouseover
     getter onmouseup
     getter onmousewheel
+    getter onoverscroll
     getter onpaste
     getter onpause
     getter onplay
@@ -6194,6 +6208,7 @@ interface SVGElement : Element
     getter onreset
     getter onresize
     getter onscroll
+    getter onscrollend
     getter onseeked
     getter onseeking
     getter onselect
@@ -6266,6 +6281,7 @@ interface SVGElement : Element
     setter onmouseover
     setter onmouseup
     setter onmousewheel
+    setter onoverscroll
     setter onpaste
     setter onpause
     setter onplay
@@ -6284,6 +6300,7 @@ interface SVGElement : Element
     setter onreset
     setter onresize
     setter onscroll
+    setter onscrollend
     setter onseeked
     setter onseeking
     setter onselect
@@ -10876,6 +10893,7 @@ interface webkitURL
     getter onmousewheel
     getter onoffline
     getter ononline
+    getter onoverscroll
     getter onpagehide
     getter onpageshow
     getter onpause
@@ -10898,6 +10916,7 @@ interface webkitURL
     getter onreset
     getter onresize
     getter onscroll
+    getter onscrollend
     getter onsearch
     getter onseeked
     getter onseeking
@@ -11071,6 +11090,7 @@ interface webkitURL
     setter onmousewheel
     setter onoffline
     setter ononline
+    setter onoverscroll
     setter onpagehide
     setter onpageshow
     setter onpause
@@ -11093,6 +11113,7 @@ interface webkitURL
     setter onreset
     setter onresize
     setter onscroll
+    setter onscrollend
     setter onsearch
     setter onseeked
     setter onseeking