WebVTT: Updated handling of non-line-snapped cue positioning

LayoutTests/media/track/track-cue-rendering-snap-to-lines-not-set-expected.txt

Index: LayoutTests/media/track/track-cue-rendering-snap-to-lines-not-set-expected.txt
diff --git a/LayoutTests/media/track/track-cue-rendering-snap-to-lines-not-set-expected.txt b/LayoutTests/media/track/track-cue-rendering-snap-to-lines-not-set-expected.txt
index 3d0c92f5c11d60b9a2817309e7227904464f616b..75037588b2b734fda4cf9850f5c19f30dda41da6 100644
--- a/LayoutTests/media/track/track-cue-rendering-snap-to-lines-not-set-expected.txt
+++ b/LayoutTests/media/track/track-cue-rendering-snap-to-lines-not-set-expected.txt
@@ -8,7 +8,7 @@ Active cues: 1
 * Cue 0 *
 EXPECTED (cueDisplayElement.innerText == 'This is a demo track to illustrate positioning features of cues.') OK
 Cue alignment (default or as specified): middle
-Cue left position (percentage): 50
+Cue left position (percentage): 0
 Cue top position (percentage): 100
 
 ** Center **
@@ -18,7 +18,7 @@ Active cues: 1
 * Cue 0 *
 EXPECTED (cueDisplayElement.innerText == 'Using HTML5 captions, you can position the cues anywhere.') OK
 Cue alignment (default or as specified): middle
-Cue left position (percentage): 50
+Cue left position (percentage): 0
 Cue top position (percentage): 50
 
 ** Top left **
@@ -38,7 +38,7 @@ Active cues: 1
 * Cue 0 *
 EXPECTED (cueDisplayElement.innerText == 'Or on the top-right corner.') OK
 Cue alignment (default or as specified): end
-Cue left position (percentage): 100
+Cue left position (percentage): 0
 Cue top position (percentage): 0
 
 ** Bottom right **
@@ -48,7 +48,7 @@ Active cues: 1
 * Cue 0 *
 EXPECTED (cueDisplayElement.innerText == 'Bottom-right corner.') OK
 Cue alignment (default or as specified): right
-Cue left position (percentage): 100
+Cue left position (percentage): 0
 Cue top position (percentage): 100
 
 ** Bottom left **
@@ -68,7 +68,7 @@ Active cues: 1
 * Cue 0 *
 EXPECTED (cueDisplayElement.innerText == 'Cues are implicitly displayed within the viewport area.') OK
 Cue alignment (default or as specified): middle
-Cue left position (percentage): 50
+Cue left position (percentage): 0
 Cue top position (percentage): 50
 
 ** Multiple cues **
@@ -78,7 +78,7 @@ Active cues: 7
 * Cue 0 *
 EXPECTED (cueDisplayElement.innerText == 'You may even have multiple cues in the same time.') OK
 Cue alignment (default or as specified): middle
-Cue left position (percentage): 50
+Cue left position (percentage): 0
 Cue top position (percentage): 50
 
 * Cue 1 *
@@ -90,19 +90,19 @@ Cue top position (percentage): 0
 * Cue 2 *
 EXPECTED (cueDisplayElement.innerText == 'Top-right cue.') OK
 Cue alignment (default or as specified): end
-Cue left position (percentage): 100
+Cue left position (percentage): 0
 Cue top position (percentage): 0
 
 * Cue 3 *
 EXPECTED (cueDisplayElement.innerText == 'Bottom cue.') OK
 Cue alignment (default or as specified): middle
-Cue left position (percentage): 50
+Cue left position (percentage): 0
 Cue top position (percentage): 100
 
 * Cue 4 *
 EXPECTED (cueDisplayElement.innerText == 'Random cue 1.') OK
 Cue alignment (default or as specified): end
-Cue left position (percentage): 100
+Cue left position (percentage): 0
 Cue top position (percentage): 25
 
 * Cue 5 *