Make FrameSelection to hold non-canonicalized positions

third_party/WebKit/LayoutTests/TestExpectations

 # Intentional failures to test the layout test system.
 Bug(intentional) [ Android Linux Win Mac10.10 Mac10.11 Retina ] harness-tests/crash.html [ Crash ]
 crbug.com/644303 [ Mac10.9 ] harness-tests/crash.html [ Crash Timeout ]
 Bug(intentional) harness-tests/timeout.html [ Timeout ]
 
 # ====== Oilpan-only failures from here ======
 # Most of these actually cause the tests to report success, rather than
 # failure. Expected outputs will be adjusted for the better once Oilpan
 # has been well and truly enabled always.
 
@@ skipping 739 matching lines @@
 # long-standing fullscreen bug. No one is going to fix the issue in the near
 # future, as foolip@ is in the process of performing a significant fullscreen
 # refactor. See [crbug.com/676432] for a minimized repro.
 crbug.com/676432 fullscreen/full-screen-iframe-zIndex.html [ Skip ]
 
 # TODO(xiaochengh): We should either convert the following tests with
 # spellcheck_test, or remove if they become redundant or inapplicable.
 crbug.com/563265 editing/spelling/spellcheck-editable-on-focus-multiframe.html [ Skip ]
 crbug.com/563265 editing/spelling/spellcheck-editable-on-focus-sync.html [ Skip ]
 
+crbug.com/625533 paint/selection/selection-drag-image-in-iframe.html  [ NeedsRebaseline ]
+
 crbug.com/657946 [ Mac ] virtual/color_space/fast/canvas/color-space/display_linear-rgb.html [ Failure ]
 crbug.com/671048 [ Linux Win ] virtual/color_space/fast/canvas/color-space/display_linear-rgb.html [ Failure ]
 
 crbug.com/538697 [ Win7 Debug ] virtual/threaded/printing/webgl-oversized-printing.html [ Failure Crash ]
 crbug.com/538697 [ Win7 Debug ] printing/webgl-oversized-printing.html [ Failure Crash ]
 
 crbug.com/617152 external/wpt/mediacapture-streams/GUM-impossible-constraint.https.html [ Skip ]
 
 crbug.com/417782 [ Linux Win ] virtual/rootlayerscrolls/fast/scrolling/fractional-scroll-offset-fixed-position-non-composited.html [ Failure ]
 crbug.com/492664 [ Linux ] external/csswg-test/css-writing-modes-3/box-offsets-rel-pos-vlr-005.xht [ Failure ]
@@ skipping 180 matching lines @@
 crbug.com/108417 external/wpt/html/rendering/non-replaced-elements/tables/table-border-1.html [ Failure ]
 crbug.com/490511 external/wpt/html/rendering/non-replaced-elements/the-hr-element-0/color.html [ Failure ]
 crbug.com/490511 external/wpt/html/rendering/non-replaced-elements/the-hr-element-0/width.html [ Failure ]
 crbug.com/490511 external/wpt/html/rendering/replaced-elements/embedded-content-rendering-rules/canvas-fallback.html [ Failure ]
 crbug.com/490511 external/wpt/html/semantics/document-metadata/styling/LinkStyle.html [ Failure Pass ]
 crbug.com/627706 external/wpt/html/semantics/embedded-content/the-img-element/invalid-src.html [ Skip ]
 # MANIFEST.json contains any *-manual.*. https://github.com/w3c/web-platform-tests/issues/4137
 Bug(github) external/wpt/uievents/keyboard/key-manual.css [ Skip ]
 Bug(github) external/wpt/uievents/keyboard/key-manual.js [ Skip ]
 
+crbug.com/691887 [ Linux Win ] external/wpt/selection/extend-00.html [ NeedsRebaseline ]
+crbug.com/691887 [ Linux Win ] external/wpt/selection/extend-20.html [ NeedsRebaseline ]
+crbug.com/691887 [ Linux Win ] external/wpt/selection/extend-40.html [ NeedsRebaseline ]
+crbug.com/691887 [ Linux Win ] external/wpt/selection/selectAllChildren.html [ NeedsRebaseline ]
+
 crbug.com/387740 external/wpt/mediacapture-streams/MediaStreamTrack-MediaElement-disabled-audio-is-silence.https.html [ Skip ]
 crbug.com/387740 external/wpt/mediacapture-streams/MediaStreamTrack-MediaElement-disabled-video-is-black.https.html [ Skip ]
 crbug.com/387740 external/wpt/mediacapture-streams/MediaStreamTrack-end.https.html [ Skip ]
 crbug.com/387740 external/wpt/mediacapture-streams/MediaStreamTrack-init.https.html [ Skip ]
 crbug.com/387740 external/wpt/mediacapture-streams/MediaStream-audio-only.https.html [ Skip ]
 crbug.com/387740 external/wpt/mediacapture-streams/MediaStream-finished-add.https.html [ Skip ]
 crbug.com/387740 external/wpt/mediacapture-streams/MediaStream-idl.https.html [ Skip ]
 crbug.com/387740 external/wpt/mediacapture-streams/MediaStream-removetrack.https.html [ Skip ]
 
 crbug.com/412381 external/wpt/mediacapture-streams/GUM-empty-option-param.https.html [ Failure ]
@@ skipping 1324 matching lines @@
 
 # Flaky on trybots
 crbug.com/688486 external/wpt/service-workers/service-worker/fetch-request-redirect.https.html [ Failure Pass ]
 crbug.com/688486 external/wpt/service-workers/service-worker/fetch-request-resources.https.html [ Failure Pass ]
 
 # Sheriff failures Feb 06 2017
 crbug.com/688515 [ Linux ] http/tests/media/video-play-stall.html [ Pass Failure ]
 
 # Sheriff failures Feb 13 2017
 crbug.com/691423 [ Mac ] fast/frames/location-change-no-file-access.html [ Failure Pass ]
-
-# Sheriff failures Feb 14 2017
-crbug.com/692047 [ Linux Win ] external/wpt/selection/extend-00.html [ NeedsManualRebaseline ]
-crbug.com/692047 [ Linux Win ] external/wpt/selection/extend-20.html [ NeedsManualRebaseline ]
-crbug.com/692047 [ Linux Win ] external/wpt/selection/extend-40.html [ NeedsManualRebaseline ]
-crbug.com/692047 [ Linux Win ] external/wpt/selection/selectAllChildren.html [ NeedsManualRebaseline ]