Place inner frame scrollbars on the left side, if indicated by the frame-level text direction.

LayoutTests/TestExpectations

Index: LayoutTests/TestExpectations
diff --git a/LayoutTests/TestExpectations b/LayoutTests/TestExpectations
index bb1e90bc45297bafa81313b143a09b08c2618920..1bb5eea4d050ddef67a09d0793ef7864246d440c 100644
--- a/LayoutTests/TestExpectations
+++ b/LayoutTests/TestExpectations
@@ -115,20 +115,30 @@ crbug.com/346134 [ Linux ] virtual/gpu/compositedscrolling/overflow/invisible-de
 crbug.com/225184 fast/repaint/relayout-fixed-position-after-scale.html [ ImageOnlyFailure ]
 
 # Pixel tests for RTL iframe scrollbar is erroneous. Cannot observe on actual browser.
-crbug.com/338794 [ Mac ] compositing/rtl/rtl-iframe-absolute-overflow.html [ NeedsManualRebaseline ]
-crbug.com/338794 [ Mac ] compositing/rtl/rtl-iframe-absolute-overflow-scrolled.html [ NeedsManualRebaseline ]
-crbug.com/338794 [ Mac ] compositing/rtl/rtl-iframe-fixed-overflow.html [ NeedsManualRebaseline ]
-crbug.com/338794 [ Mac ] compositing/rtl/rtl-iframe-fixed-overflow-scrolled.html [ NeedsManualRebaseline ]
-crbug.com/338794 [ Mac ] virtual/softwarecompositing/rtl/rtl-iframe-absolute-overflow.html [ NeedsManualRebaseline ]
-crbug.com/338794 [ Mac ] virtual/softwarecompositing/rtl/rtl-iframe-absolute-overflow-scrolled.html [ NeedsManualRebaseline ]
-crbug.com/338794 [ Mac ] virtual/softwarecompositing/rtl/rtl-iframe-fixed-overflow.html [ NeedsManualRebaseline ]
-crbug.com/338794 [ Mac ] virtual/softwarecompositing/rtl/rtl-iframe-fixed-overflow-scrolled.html [ NeedsManualRebaseline ]
-crbug.com/192172 [ Win Linux Android Debug ] compositing/rtl/rtl-iframe-absolute-overflow.html [ Failure Pass ]
-crbug.com/192172 [ Win Linux Android Debug ] virtual/softwarecompositing/rtl/rtl-iframe-absolute-overflow.html [ Failure Pass ]
-crbug.com/192172 [ Win Linux Android Debug ] compositing/rtl/rtl-iframe-fixed-overflow-scrolled.html [ Failure Pass ]
-crbug.com/192172 [ Win Linux Android Debug ] virtual/softwarecompositing/rtl/rtl-iframe-fixed-overflow-scrolled.html [ Failure Pass ]
-crbug.com/192172 [ Win Linux Android Debug ] compositing/rtl/rtl-iframe-fixed-overflow.html [ Failure Pass ]
-crbug.com/192172 [ Win Linux Android Debug ] virtual/softwarecompositing/rtl/rtl-iframe-fixed-overflow.html [ Failure Pass ]
+# Temporarily marking the flaky set below as NeedsManualRebaseline, so we can grab results
+# from the bots, rebaseline, and re-mark them out as flaky.
+#crbug.com/338794 [ Mac ] compositing/rtl/rtl-iframe-absolute-overflow.html [ NeedsManualRebaseline ]
+#crbug.com/338794 [ Mac ] compositing/rtl/rtl-iframe-absolute-overflow-scrolled.html [ NeedsManualRebaseline ]
+#crbug.com/338794 [ Mac ] compositing/rtl/rtl-iframe-fixed-overflow.html [ NeedsManualRebaseline ]
+#crbug.com/338794 [ Mac ] compositing/rtl/rtl-iframe-fixed-overflow-scrolled.html [ NeedsManualRebaseline ]
+#crbug.com/338794 [ Mac ] virtual/softwarecompositing/rtl/rtl-iframe-absolute-overflow.html [ NeedsManualRebaseline ]
+#crbug.com/338794 [ Mac ] virtual/softwarecompositing/rtl/rtl-iframe-absolute-overflow-scrolled.html [ NeedsManualRebaseline ]
+#crbug.com/338794 [ Mac ] virtual/softwarecompositing/rtl/rtl-iframe-fixed-overflow.html [ NeedsManualRebaseline ]
+#crbug.com/338794 [ Mac ] virtual/softwarecompositing/rtl/rtl-iframe-fixed-overflow-scrolled.html [ NeedsManualRebaseline ]
+#crbug.com/192172 [ Win Linux Android Debug ] compositing/rtl/rtl-iframe-absolute-overflow.html [ Failure Pass ]
+#crbug.com/192172 [ Win Linux Android Debug ] virtual/softwarecompositing/rtl/rtl-iframe-absolute-overflow.html [ Failure Pass ]
+#crbug.com/192172 [ Win Linux Android Debug ] compositing/rtl/rtl-iframe-fixed-overflow-scrolled.html [ Failure Pass ]
+#crbug.com/192172 [ Win Linux Android Debug ] virtual/softwarecompositing/rtl/rtl-iframe-fixed-overflow-scrolled.html [ Failure Pass ]
+#crbug.com/192172 [ Win Linux Android Debug ] compositing/rtl/rtl-iframe-fixed-overflow.html [ Failure Pass ]
+#crbug.com/192172 [ Win Linux Android Debug ] virtual/softwarecompositing/rtl/rtl-iframe-fixed-overflow.html [ Failure Pass ]
+crbug.com/250514 compositing/rtl/rtl-iframe-absolute-overflow.html [ NeedsManualRebaseline ]
+crbug.com/250514 compositing/rtl/rtl-iframe-absolute-overflow-scrolled.html [ NeedsManualRebaseline ]
+crbug.com/250514 compositing/rtl/rtl-iframe-fixed-overflow.html [ NeedsManualRebaseline ]
+crbug.com/250514 compositing/rtl/rtl-iframe-fixed-overflow-scrolled.html [ NeedsManualRebaseline ]
+crbug.com/250514 virtual/softwarecompositing/rtl/rtl-iframe-absolute-overflow.html [ NeedsManualRebaseline ]
+crbug.com/250514 virtual/softwarecompositing/rtl/rtl-iframe-absolute-overflow-scrolled.html [ NeedsManualRebaseline ]
+crbug.com/250514 virtual/softwarecompositing/rtl/rtl-iframe-fixed-overflow.html [ NeedsManualRebaseline ]
+crbug.com/250514 virtual/softwarecompositing/rtl/rtl-iframe-fixed-overflow-scrolled.html [ NeedsManualRebaseline ]
 
 crbug.com/239811 crbug.com/229113 http/tests/history/redirect-js-location-assign-0-seconds.html [ Failure Pass ]