Bug 1280133 - Add hidpi toolbar icons for Linux. r=Gijs

MozReview-Commit-ID: IhJC4tegT11

--HG--
extra : rebase_source : 8d4367abc4508664dbfee3972ba089eafe32c311

browser/themes/linux/jar.mn

@@ -41,7 +41,9 @@ browser.jar:
   skin/classic/browser/setDesktopBackground.css
   skin/classic/browser/slowStartup-16.png
   skin/classic/browser/Toolbar.png
+  skin/classic/browser/Toolbar@2x.png
   skin/classic/browser/Toolbar-inverted.png
+  skin/classic/browser/Toolbar-inverted@2x.png
   skin/classic/browser/Toolbar-small.png
   skin/classic/browser/webRTC-indicator.css
 * skin/classic/browser/controlcenter/panel.css        (controlcenter/panel.css)

browser/themes/shared/toolbarbuttons.inc.css

@@ -175,7 +175,6 @@ toolbar[brighttext] #bookmarks-menu-button > .toolbarbutton-menubutton-dropmarke
   -moz-image-region: rect(0, 738px, 18px, 720px);
 }
 
-%if defined(XP_WIN) || defined(XP_MACOSX)
 @media (min-resolution: 1.1dppx) {
   :-moz-any(@primaryToolbarButtons@),
   #bookmarks-menu-button > .toolbarbutton-menubutton-dropmarker > .dropmarker-icon {
@@ -346,4 +345,3 @@ toolbar[brighttext] #bookmarks-menu-button > .toolbarbutton-menubutton-dropmarke
     -moz-image-region: rect(0, 1476px, 36px, 1440px);
   }
 }
-%endif