Bug 1119057 - Scrollbar position should follow the document 'dir'. r=timdream

b2g/app/b2g.js

@@ -688,6 +688,9 @@ pref("ui.useOverlayScrollbars", 1);
 pref("ui.scrollbarFadeBeginDelay", 450);
 pref("ui.scrollbarFadeDuration", 200);
 
+// Scrollbar position follows the document `dir` attribute
+pref("layout.scrollbar.side", 1);
+
 // Enable the ProcessPriorityManager, and give processes with no visible
 // documents a 1s grace period before they're eligible to be marked as
 // background. Background processes that are perceivable due to playing

b2g/chrome/content/content.css

@@ -36,6 +36,13 @@ xul|scrollbar[orient="vertical"] {
   max-width: 8px;
 }
 
+/* workaround for bug 1119057: as -moz-margin-start may not work as expected,
+ * force a right margin value in RTL mode.  */
+[dir="rtl"] xul|scrollbar[root="true"][orient="vertical"] {
+  -moz-margin-start: unset;
+  margin-right: -8px;
+}
+
 xul|scrollbar[orient="vertical"] xul|thumb {
   max-width: 6px !important;
   min-width: 6px !important;