Made layout viewport scroll updates from compositor work like ordinary layers.

third_party/WebKit/Source/web/tests/VisualViewportTest.cpp

Index: third_party/WebKit/Source/web/tests/VisualViewportTest.cpp
diff --git a/third_party/WebKit/Source/web/tests/VisualViewportTest.cpp b/third_party/WebKit/Source/web/tests/VisualViewportTest.cpp
index bf4f4cd7a8e304fbc1b3e88d314a9f6d99ee7a7c..949d3e1bf55d685c1b700d3fd6f314fc2ab5c18a 100644
--- a/third_party/WebKit/Source/web/tests/VisualViewportTest.cpp
+++ b/third_party/WebKit/Source/web/tests/VisualViewportTest.cpp
@@ -524,7 +524,8 @@ TEST_P(ParameterizedVisualViewportTest, TestFractionalScrollOffsetIsNotOverwritt
 
     FrameView& frameView = *webViewImpl()->mainFrameImpl()->frameView();
     frameView.layoutViewportScrollableArea()->setScrollPosition(DoublePoint(0, 10.5), ProgrammaticScroll);
-    webViewImpl()->applyViewportDeltas(WebFloatSize(), WebFloatSize(10, 20), WebFloatSize(), 1, 0);
+    frameView.layoutViewportScrollableArea()->ScrollableArea::setScrollPosition(
+        DoublePoint(10, 30.5), CompositorScroll);
 
     EXPECT_EQ(30.5, frameView.layoutViewportScrollableArea()->scrollPositionDouble().y());
 
@@ -1176,37 +1177,6 @@ TEST_P(ParameterizedVisualViewportTest, ScrollIntoViewFractionalOffset)
     EXPECT_POINT_EQ(FloatPoint(250.5f, 100.5f), visualViewport.location());
 }
 
-// Top controls can make an unscrollable page temporarily scrollable, causing
-// a scroll clamp when the page is resized. Make sure this bug is fixed.
-// crbug.com/437620
-TEST_F(VisualViewportTest, TestResizeDoesntChangeScrollOffset)
-{
-    RuntimeEnabledFeatures::setInertTopControlsEnabled(false);
-    initializeWithAndroidSettings();
-    webViewImpl()->resizeWithTopControls(IntSize(980, 650), 20, false);
-
-    navigateTo("about:blank");
-
-    VisualViewport& visualViewport = frame()->page()->frameHost().visualViewport();
-    FrameView& frameView = *webViewImpl()->mainFrameImpl()->frameView();
-
-    // Outer viewport isn't scrollable
-    EXPECT_SIZE_EQ(IntSize(980, 650), frameView.visibleContentRect().size());
-
-    visualViewport.setScale(2);
-    visualViewport.move(FloatPoint(0, 40));
-
-    // Simulate bringing down the top controls by 20px but counterscrolling the outer viewport.
-    webViewImpl()->applyViewportDeltas(WebFloatSize(), WebFloatSize(0, 20), WebFloatSize(), 1, 1);
-
-    EXPECT_EQ(20, frameView.layoutViewportScrollableArea()->scrollPosition().y());
-
-    webViewImpl()->resizeWithTopControls(WebSize(980, 630), 20, true);
-
-    EXPECT_EQ(0, frameView.layoutViewportScrollableArea()->scrollPosition().y());
-    EXPECT_EQ(60, visualViewport.location().y());
-}
-
 static IntPoint expectedMaxFrameViewScrollOffset(VisualViewport& visualViewport, FrameView& frameView)
 {
     float aspectRatio = visualViewport.visibleRect().width() / visualViewport.visibleRect().height();