LayoutBox::scrollRectToVisible doesn't respect overflow:hidden property.

third_party/WebKit/Source/core/frame/RootFrameViewport.cpp

Index: third_party/WebKit/Source/core/frame/RootFrameViewport.cpp
diff --git a/third_party/WebKit/Source/core/frame/RootFrameViewport.cpp b/third_party/WebKit/Source/core/frame/RootFrameViewport.cpp
index eb60da7f4533a3b0a955cb7d1f04706be97ba581..a02be4ccdbc1d8ca71a51b9643ab49e78b6b1759 100644
--- a/third_party/WebKit/Source/core/frame/RootFrameViewport.cpp
+++ b/third_party/WebKit/Source/core/frame/RootFrameViewport.cpp
@@ -93,7 +93,7 @@ ScrollBehavior RootFrameViewport::scrollBehaviorStyle() const
     return layoutViewport().scrollBehaviorStyle();
 }
 
-LayoutRect RootFrameViewport::scrollIntoView(const LayoutRect& rectInContent, const ScrollAlignment& alignX, const ScrollAlignment& alignY)
+LayoutRect RootFrameViewport::scrollIntoView(const LayoutRect& rectInContent, const ScrollAlignment& alignX, const ScrollAlignment& alignY, ScrollType scrollType)
 {
     // We want to move the rect into the viewport that excludes the scrollbars so we intersect
     // the visual viewport with the scrollbar-excluded frameView content rect. However, we don't
@@ -129,7 +129,7 @@ LayoutRect RootFrameViewport::scrollIntoView(const LayoutRect& rectInContent, co
         targetViewport.x() - centeringOffsetX,
         targetViewport.y() - centeringOffsetY);
 
-    setScrollPosition(targetOffset, ProgrammaticScroll);
+    setScrollPosition(targetOffset, scrollType, ScrollBehaviorInstant);
 
     // RootFrameViewport only changes the viewport relative to the document so we can't change the input
     // rect's location relative to the document origin.