bug 886816 fix share icon on retina display, r=mconley

browser/themes/osx/browser.css

@@ -1684,6 +1684,22 @@ window[tabsontop="false"] richlistitem[type~="action"][actiontype="switchtab"][s
   list-style-image: url("chrome://browser/skin/social/share-button-active.png");
 }
 
+#social-share-button > .toolbarbutton-icon {
+  width: 13px;
+  height: 14px;
+}
+
+@media (min-resolution: 2dppx) {
+  #social-share-button {
+    list-style-image: url("chrome://browser/skin/social/share-button@2x.png");
+  }
+
+  #social-share-button[open],
+  #social-share-button:hover:active {
+    list-style-image: url("chrome://browser/skin/social/share-button-active@2x.png");
+  }
+}
+
 .social-share-toolbar {
   border-right: 1px solid #dedede;
   background: linear-gradient(to bottom, rgba(247,247,247,.99), rgba(247,247,247,.95));

browser/themes/osx/jar.mn

@@ -175,7 +175,9 @@ browser.jar:
   skin/classic/browser/social/services-64.png               (social/services-64.png)
   skin/classic/browser/social/services-64@2x.png            (social/services-64@2x.png)
   skin/classic/browser/social/share-button.png              (social/share-button.png)
+  skin/classic/browser/social/share-button@2x.png           (social/share-button@2x.png)
   skin/classic/browser/social/share-button-active.png       (social/share-button-active.png)
+  skin/classic/browser/social/share-button-active@2x.png    (social/share-button-active@2x.png)
   skin/classic/browser/social/chat-icons.png                             (social/chat-icons.png)
   skin/classic/browser/tabbrowser/alltabs-box-bkgnd-icon.png             (tabbrowser/alltabs-box-bkgnd-icon.png)
   skin/classic/browser/tabbrowser/newtab.png                             (tabbrowser/newtab.png)

browser/themes/shared/browser.inc

@@ -1,3 +1,3 @@
 %filter substitution
 
-%define primaryToolbarButtons #back-button, #forward-button, #reload-button, #stop-button, #home-button, #print-button, #downloads-button, #downloads-indicator, #history-button, #bookmarks-button, #bookmarks-menu-button, #new-tab-button, #new-window-button, #cut-button, #copy-button, #paste-button, #fullscreen-button, #zoom-out-button, #zoom-in-button, #sync-button, #feed-button, #alltabs-button, #tabview-button, #webrtc-status-button, #social-share-button
+%define primaryToolbarButtons #back-button, #forward-button, #reload-button, #stop-button, #home-button, #print-button, #downloads-button, #downloads-indicator, #history-button, #bookmarks-button, #bookmarks-menu-button, #new-tab-button, #new-window-button, #cut-button, #copy-button, #paste-button, #fullscreen-button, #zoom-out-button, #zoom-in-button, #sync-button, #feed-button, #alltabs-button, #tabview-button, #webrtc-status-button