Bug 1276130 - part1 : replace the value 'middle' with 'center. r=rillian,smaug

MozReview-Commit-ID: 9rh32HkilYv

--HG--
extra : rebase_source : bf08e4ffc77378553760dfae3854248cf700ea09

dom/media/TextTrackCue.cpp

@@ -39,7 +39,7 @@ TextTrackCue::SetDefaultCueSettings()
   mPauseOnExit = false;
   mSnapToLines = true;
   mLineIsAutoKeyword = true;
-  mAlign = AlignSetting::Middle;
+  mAlign = AlignSetting::Center;
   mLineAlign = LineAlignSetting::Start;
   mVertical = DirectionSetting::_empty;
   mActive = false;

dom/media/webvtt/vtt.jsm

@@ -218,7 +218,7 @@ this.EXPORTED_SYMBOLS = ["WebVTT"];
           settings.percent(k, v);
           break;
         case "align":
-          settings.alt(k, v, ["start", "middle", "end", "left", "right"]);
+          settings.alt(k, v, ["start", "center", "end", "left", "right"]);
           break;
         }
       }, /:/, /\s/);
@@ -230,7 +230,7 @@ this.EXPORTED_SYMBOLS = ["WebVTT"];
       cue.lineAlign = settings.get("lineAlign", "start");
       cue.snapToLines = settings.get("snapToLines", true);
       cue.size = settings.get("size", 100);
-      cue.align = settings.get("align", "middle");
+      cue.align = settings.get("align", "center");
       cue.position = settings.get("position", {
         start: 0,
         left: 0,
@@ -736,11 +736,10 @@ this.EXPORTED_SYMBOLS = ["WebVTT"];
     this.applyStyles(styles, this.cueDiv);
 
     // Create an absolutely positioned div that will be used to position the cue
-    // div. Note, all WebVTT cue-setting alignments are equivalent to the CSS
-    // mirrors of them except "middle" which is "center" in CSS.
+    // div.
     this.div = window.document.createElement("div");
     styles = {
-      textAlign: cue.align === "middle" ? "center" : cue.align,
+      textAlign: cue.align,
       font: styleOptions.font,
       whiteSpace: "pre-line",
       position: "absolute"

dom/webidl/VTTCue.webidl

@@ -24,7 +24,7 @@ enum PositionAlignSetting {
 
 enum AlignSetting {
   "start",
-  "middle",
+  "center",
   "end",
   "left",
   "right"