Bug 1366278 - Get rid of --urlbar-background-color since it's always -moz-field and textbox.css already sets that by default. r=dale

MozReview-Commit-ID: C0nBOYl6CYd

browser/themes/linux/browser.css

@@ -268,13 +268,17 @@ menuitem.bookmark-item {
 #main-window {
   --urlbar-border-color: ThreeDShadow;
   --urlbar-border-color-hover: var(--urlbar-border-color);
-  --urlbar-background-color: -moz-field;
 }
 
 #navigator-toolbox:-moz-lwtheme {
   --urlbar-border-color: rgba(0,0,0,.3);
 }
 
+#urlbar {
+  /* override textbox[enablehistory="true"] styling: */
+  background-color: -moz-field;
+}
+
 %include ../shared/urlbar-searchbar.inc.css
 
 %ifdef MOZ_PHOTON_THEME
@@ -301,10 +305,6 @@ menuitem.bookmark-item {
   border-color: Highlight;
 }
 
-#urlbar {
-  background-color: -moz-field;
-}
-
 #urlbar:-moz-lwtheme,
 .searchbar-textbox:-moz-lwtheme {
   background-color: rgba(255,255,255,.8);

browser/themes/osx/browser.css

@@ -527,7 +527,6 @@ toolbarpaletteitem[place="palette"] > #personal-bookmarks > #bookmarks-toolbar-p
 #main-window {
   --urlbar-border-color: hsla(240, 5%, 5%, .25);
   --urlbar-border-color-hover: hsla(240, 5%, 5%, .35);
-  --urlbar-background-color: -moz-field;
 }
 
 #urlbar[focused="true"],

browser/themes/shared/urlbar-searchbar.inc.css

@@ -8,7 +8,6 @@
 .searchbar-textbox {
   -moz-appearance: none;
   background-clip: content-box;
-  background-color: var(--urlbar-background-color);
   border: 1px solid var(--urlbar-border-color);
   border-radius: var(--toolbarbutton-border-radius);
   box-shadow: 0 1px 4px hsla(0, 0%, 0%, .05);

browser/themes/windows/browser.css

@@ -670,7 +670,6 @@ toolbar[brighttext] #close-button {
   #main-window:not(:-moz-lwtheme) {
     --urlbar-border-color: hsla(240, 5%, 5%, .25);
     --urlbar-border-color-hover: hsla(240, 5%, 5%, .35);
-    --urlbar-background-color: -moz-field;
   }
 }