Remove plumbing for inert-visual-viewport flag

third_party/WebKit/LayoutTests/fast/events/touch/gesture/touch-gesture-fling-with-page-scale.html

Index: third_party/WebKit/LayoutTests/fast/events/touch/gesture/touch-gesture-fling-with-page-scale.html
diff --git a/third_party/WebKit/LayoutTests/fast/events/touch/gesture/touch-gesture-fling-with-page-scale.html b/third_party/WebKit/LayoutTests/fast/events/touch/gesture/touch-gesture-fling-with-page-scale.html
index 59a5092756de4076e8012f7ed257e044fb5e74e7..f605f91889e04b0a0deaa377756e592901b08c97 100644
--- a/third_party/WebKit/LayoutTests/fast/events/touch/gesture/touch-gesture-fling-with-page-scale.html
+++ b/third_party/WebKit/LayoutTests/fast/events/touch/gesture/touch-gesture-fling-with-page-scale.html
@@ -84,6 +84,10 @@
   }
 
   var setContainerDoesntScrollExpectation = function() {
+    // Scrolling just the visual viewport doesn't trigger scroll events. Thus,
+    // we scroll the layout viewport before the fling so that the fling triggers
+    // the scrollHandler.
+    window.scrollTo(10, 10);

[bokan, 2015/10/21 21:48:36]

I'm a bit worried that this could cause flakiness if we fire the scroll handler
before the scroll reaches one of the container boxes.

Could you instead scroll the window in reset() and adjust the startX/Y position
(or if you scroll to (1, 1) you probably don't even have to adjust the startX/Y)
so that when the container boxes finish scrolling, they'll bubble up and cause a
scroll on the window?

     window.addEventListener("scroll", scrollHandler);
     checkExpectation = function() {
       shouldBe('verticalContainer.scrollTop', 'fullyScrolled');
@@ -188,6 +192,10 @@
 </script>
 
 <style>
+  body {
+    width: 1000px;
+    height: 1000px;
+  }
   .verticalContainer {
     position: absolute;
     left: 350px;