Reland 176261: Fix for select PopupMenuList appearance in rtl mode with overlay-scrollbar enabled.

Source/web/PopupListBox.cpp

Index: Source/web/PopupListBox.cpp
diff --git a/Source/web/PopupListBox.cpp b/Source/web/PopupListBox.cpp
index 02d7957ab75e2ab0159e77d3204c7e4797080b5a..592dd971be3875adb03952993e74d0244a9ff192 100644
--- a/Source/web/PopupListBox.cpp
+++ b/Source/web/PopupListBox.cpp
@@ -349,7 +349,7 @@ void PopupListBox::paint(GraphicsContext* gc, const IntRect& rect)
 {
     // Adjust coords for scrolled frame.
     IntRect r = intersection(rect, frameRect());
-    int tx = x() - scrollX() + ((shouldPlaceVerticalScrollbarOnLeft() && verticalScrollbar()) ? verticalScrollbar()->width() : 0);
+    int tx = x() - scrollX() + ((shouldPlaceVerticalScrollbarOnLeft() && verticalScrollbar() && !verticalScrollbar()->isOverlayScrollbar()) ? verticalScrollbar()->width() : 0);
     int ty = y() - scrollY();
 
     r.move(-tx, -ty);
@@ -596,7 +596,7 @@ void PopupListBox::invalidateRow(int index)
     // Invalidate in the window contents, as FramelessScrollView::invalidateRect
     // paints in the window coordinates.
     IntRect clipRect = contentsToWindow(getRowBounds(index));
-    if (shouldPlaceVerticalScrollbarOnLeft() && verticalScrollbar())
+    if (shouldPlaceVerticalScrollbarOnLeft() && verticalScrollbar() && !verticalScrollbar()->isOverlayScrollbar())
         clipRect.move(verticalScrollbar()->width(), 0);
     invalidateRect(clipRect);
 }
@@ -773,7 +773,8 @@ void PopupListBox::layout()
     // Set our widget and scrollable contents sizes.
     int scrollbarWidth = 0;
     if (m_visibleRows < numItems()) {
-        scrollbarWidth = ScrollbarTheme::theme()->scrollbarThickness();
+        if (!ScrollbarTheme::theme()->usesOverlayScrollbars())
+            scrollbarWidth = ScrollbarTheme::theme()->scrollbarThickness();
 
         // Use minEndOfLinePadding when there is a scrollbar so that we use
         // as much as (lineEndPaddingWidth - minEndOfLinePadding) padding