Bug 1509634 - Remove toolkit/themes/osx/mozapps/extensions/toolbarbutton-dropmarker.png and replace usage with arrow-dropdown-12.svg. r=jaws

--HG--
extra : rebase_source : 598c42cfb7d2aa9d9fe760356ad7549728c8c6a5
extra : amend_source : 7fa23f019690670ab5534f0f41715f86b7f4116e

toolkit/themes/osx/mozapps/extensions/extensions.css

@@ -19,7 +19,7 @@
 }
 
 #header-utils-btn > .toolbarbutton-menu-dropmarker {
-  list-style-image: url("chrome://mozapps/skin/extensions/toolbarbutton-dropmarker.png");
+  list-style-image: url("chrome://global/skin/icons/arrow-dropdown-12.svg");
   padding: 0;
   margin-inline-start: 2px;
 }

toolkit/themes/osx/mozapps/jar.mn

@@ -10,7 +10,6 @@ toolkit.jar:
   skin/classic/mozapps/extensions/rating-won.png                  (extensions/rating-won.png)
   skin/classic/mozapps/extensions/rating-not-won.png              (extensions/rating-not-won.png)
   skin/classic/mozapps/extensions/cancel.png                      (extensions/cancel.png)
-  skin/classic/mozapps/extensions/toolbarbutton-dropmarker.png    (extensions/toolbarbutton-dropmarker.png)
 * skin/classic/mozapps/extensions/extensions.css                  (extensions/extensions.css)
   skin/classic/mozapps/extensions/blocklist.css                   (extensions/blocklist.css)
   skin/classic/mozapps/profile/profileSelection.css               (profile/profileSelection.css)