Replace various ScrollableArea scroll methods with setScrollPosition

Source/web/WebViewImpl.cpp

Index: Source/web/WebViewImpl.cpp
diff --git a/Source/web/WebViewImpl.cpp b/Source/web/WebViewImpl.cpp
index 9be0184e482fc82dc9fe2aa9ec055af4336499e1..c8fb5251e563d28561c6a3cd5e3c8d44c75f81a3 100644
--- a/Source/web/WebViewImpl.cpp
+++ b/Source/web/WebViewImpl.cpp
@@ -903,7 +903,7 @@ bool WebViewImpl::startPageScaleAnimation(const IntPoint& targetPosition, bool u
 
             FrameView* view = mainFrameImpl()->frameView();
             if (view && view->scrollableArea())
-                view->scrollableArea()->setScrollPosition(DoublePoint(clampedPoint.x, clampedPoint.y));
+                view->scrollableArea()->setScrollPosition(DoublePoint(clampedPoint.x, clampedPoint.y), ProgrammaticScroll);
 
             return false;
         }
@@ -3063,7 +3063,7 @@ void WebViewImpl::scrollAndRescaleViewports(float scaleFactor,
     // Order is important: pinch viewport location is clamped based on
     // main frame scroll position and pinch viewport scale.
 
-    view->setScrollOffset(mainFrameOrigin);
+    view->setScrollPosition(mainFrameOrigin, ProgrammaticScroll);
 
     setPageScaleFactor(scaleFactor);