Content is cropped and shifts to the left in RTL iFrames with scrollbars

LayoutTests/TestExpectations

Index: LayoutTests/TestExpectations
diff --git a/LayoutTests/TestExpectations b/LayoutTests/TestExpectations
index e3b559a404ff5890daa13a86c7b8bb2c8299674c..50eeadca63d42b6259e493172cde739c9230366d 100644
--- a/LayoutTests/TestExpectations
+++ b/LayoutTests/TestExpectations
@@ -207,14 +207,16 @@ crbug.com/371916 [ Debug ] http/tests/security/contentSecurityPolicy/xsl-unaffec
 crbug.com/371916 [ Debug ] http/tests/security/contentSecurityPolicy/xsl-allowed.php [ Crash Timeout ]
 
 # Pixel tests for RTL iframe scrollbar is erroneous. Cannot observe on actual browser.
-crbug.com/338794 crbug.com/192172 compositing/rtl/rtl-iframe-absolute-overflow.html [ Pass Failure ]
-crbug.com/338794 compositing/rtl/rtl-iframe-absolute-overflow-scrolled.html [ Pass Failure ]
-crbug.com/338794 crbug.com/192172 compositing/rtl/rtl-iframe-fixed-overflow-scrolled.html [ Pass Failure ]
-crbug.com/338794 virtual/softwarecompositing/rtl/rtl-iframe-absolute-overflow-scrolled.html [ Pass Failure ]
-crbug.com/338794 crbug.com/192172 compositing/rtl/rtl-iframe-fixed-overflow.html [ Pass Failure ]
-crbug.com/338794 crbug.com/192172 virtual/softwarecompositing/rtl/rtl-iframe-fixed-overflow.html [ Pass Failure ]
-crbug.com/338794 crbug.com/192172 virtual/softwarecompositing/rtl/rtl-iframe-fixed-overflow-scrolled.html [ Pass Failure ]
-crbug.com/338794 crbug.com/192172 virtual/softwarecompositing/rtl/rtl-iframe-absolute-overflow.html [ Pass Failure ]
+# 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 crbug.com/192172 compositing/rtl/rtl-iframe-absolute-overflow.html [ NeedsManualRebaseline ]
+crbug.com/338794 compositing/rtl/rtl-iframe-absolute-overflow-scrolled.html [ NeedsManualRebaseline ]
+crbug.com/338794 crbug.com/192172 compositing/rtl/rtl-iframe-fixed-overflow-scrolled.html [ NeedsManualRebaseline ]
+crbug.com/338794 virtual/softwarecompositing/rtl/rtl-iframe-absolute-overflow-scrolled.html [ NeedsManualRebaseline ]
+crbug.com/338794 crbug.com/192172 compositing/rtl/rtl-iframe-fixed-overflow.html [ NeedsManualRebaseline ]
+crbug.com/338794 crbug.com/192172 virtual/softwarecompositing/rtl/rtl-iframe-fixed-overflow.html [ NeedsManualRebaseline ]
+crbug.com/338794 crbug.com/192172 virtual/softwarecompositing/rtl/rtl-iframe-fixed-overflow-scrolled.html [ NeedsManualRebaseline ]
+crbug.com/338794 crbug.com/192172 virtual/softwarecompositing/rtl/rtl-iframe-absolute-overflow.html [ NeedsManualRebaseline ]
 
 crbug.com/239811 crbug.com/229113 http/tests/history/redirect-js-location-assign-0-seconds.html [ Failure Pass ]