[ios] Fixed Multi-Window size issue on iPhone portrait

Reverse case of problem solved in cl 2359137.
Closing chrome with window in landscape and restarting in
portrait leads in blank areas.

Bug: 1113187
Change-Id: Ie0155d49cf50e23ff0cd95c9afc49598080a5162
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2377807Reviewed-by: Mark Cogan <marq@chromium.org>
Commit-Queue: David Jean <djean@chromium.org>
Cr-Commit-Position: refs/heads/master@{#802132}

ios/chrome/app/chrome_overlay_window.mm

@@ -73,9 +73,9 @@
 
 - (void)setFrame:(CGRect)rect {
   if (@available(iOS 13, *)) {
-    if (!IsIPadIdiom() && (rect.origin.x < 0 || rect.origin.y < 0)) {
+    if (!IsIPadIdiom() && (rect.origin.x != 0 || rect.origin.y != 0)) {
       // skip, this rect is wrong and probably in portrait while
-      // display is in landscape.
+      // display is in landscape or vice-versa.
     } else {
       [super setFrame:rect];
     }