Bug 1662671 - Remove css for adding an unused resize property for Windows, r=NeilDeakin,remote-protocol-reviewers,maja_zf

Before Quantum, we needed resizer icon on Windows, because when the
add-on statusbar was hidden, we could not resize the window. This is not
needed anymore and is dead code. Consequentially, this also helps reduce
unused images loaded at startup time.

Differential Revision: https://phabricator.services.mozilla.com/D91196

browser/base/content/test/performance/browser_startup_images.js

@@ -57,11 +57,6 @@ const knownUnshownImages = [
     intermittentShown: ["win", "linux"],
   },
 
-  {
-    file: "chrome://global/skin/icons/resizer.svg",
-    platforms: ["win"],
-  },
-
   {
     file: "chrome://browser/skin/window-controls/maximize.svg",
     platforms: ["win"],

docshell/test/chrome/test_bug909218.html

@@ -92,7 +92,7 @@ var RequestWatcher = {
     // have the flag, so we just ignore them.
     // We also see, eg, resource://gre-resources/loading-image.png, so
     // skip resource:// URLs too.
-    // We may also see, eg, chrome://global/skin/icons/resizer.svg, so
+    // We may also see, eg, chrome://browser/skin/chevron.svg, so
     // skip chrome:// URLs too.
     if (req.name.startsWith("about:") || req.name.startsWith("resource:") ||
         req.name.startsWith("chrome:") || req.name.startsWith("documentchannel:")) {

layout/style/res/ua.css

@@ -254,9 +254,6 @@
 
 *|*::-moz-viewport-scroll {
   overflow: auto;
-%ifdef XP_WIN
-  resize: both;
-%endif
 }
 
 *|*::-moz-column-set,

remote/test/browser/network/browser_setCacheDisabled.js

@@ -78,7 +78,7 @@ function checkLoadFlags(flags, url) {
           // have the flag, so we just ignore them.
           // We also see, eg, resource://gre-resources/loading-image.png, so
           // skip resource:// URLs too.
-          // We may also see, eg, chrome://global/skin/icons/resizer.svg, so
+          // We may also see, eg, chrome://browser/skin/chevron.svg, so
           // skip chrome:// URLs too.
           if (
             request.name.startsWith("about:") ||