Bug 1150284. Disable offsetX/offsetY properties in FxOS/Fennec. r=smaug

--HG--
extra : commitid : 2uMnlr9UPTZ
extra : rebase_source : 1a8975b12472082f4b67fc03904054faa9393645
extra : amend_source : 26b0ba8272ec29c28d1165280223a7f0037ba084

b2g/app/b2g.js

@@ -222,6 +222,10 @@ pref("dom.max_script_run_time", 0);
 pref("dom.max_chrome_script_run_time", 0);
 pref("dom.max_child_script_run_time", 0);
 
+// Temporarily disable support for offsetX/Y to work around Google Maps bug
+// (bug 1150284)
+pref("dom.mouseEvent.offsetXY.enabled", false);
+
 // plugins
 pref("plugin.disable", true);
 pref("dom.ipc.plugins.enabled", true);

dom/events/test/mochitest.ini

@@ -189,6 +189,7 @@ skip-if = buildapp == 'b2g' || e10s
 support-files =
   bug1096146_embedded.html
 [test_offsetxy.html]
+skip-if = toolkit == 'android' || buildapp == 'b2g'
 [test_eventhandler_scoping.html]
 [test_bug1013412.html]
 skip-if = buildapp == 'b2g' # no wheel events on b2g

dom/webidl/MouseEvent.webidl

@@ -16,7 +16,9 @@ interface MouseEvent : UIEvent {
   readonly attribute long           screenY;
   readonly attribute long           clientX;
   readonly attribute long           clientY;
+[Pref="dom.mouseEvent.offsetXY.enabled"]
   readonly attribute long           offsetX;
+[Pref="dom.mouseEvent.offsetXY.enabled"]
   readonly attribute long           offsetY;
   readonly attribute boolean        ctrlKey;
   readonly attribute boolean        shiftKey;

mobile/android/app/mobile.js

@@ -548,6 +548,10 @@ pref("layers.low-precision-opacity", "1.0");
 // work harder keep scrolling smooth and memory low.
 pref("layers.max-active", 20);
 
+// Temporarily disable support for offsetX/Y to work around Google Maps bug
+// (bug 1150284)
+pref("dom.mouseEvent.offsetXY.enabled", false);
+
 pref("notification.feature.enabled", true);
 pref("dom.webnotifications.enabled", true);
 

modules/libpref/init/all.js

@@ -2328,6 +2328,9 @@ pref("layout.css.font-loading-api.enabled", false);
 pref("layout.css.font-loading-api.enabled", true);
 #endif
 
+// Are the MouseEvent.offsetX/Y properties enabled?
+pref("dom.mouseEvent.offsetXY.enabled", true);
+
 // pref for which side vertical scrollbars should be on
 // 0 = end-side in UI direction
 // 1 = end-side in document/content direction