Improve UI for unpacked extensions failing to load

chrome/browser/resources/extensions/extension_error_overlay.css

Index: chrome/browser/resources/extensions/extension_error_overlay.css
diff --git a/chrome/browser/resources/extensions/extension_error_overlay.css b/chrome/browser/resources/extensions/extension_error_overlay.css
index d7cff5deb2e6b544e214a5b73f3237514d3c6181..44af1f2effafe42db79dd74d2e060471153a4cce 100644
--- a/chrome/browser/resources/extensions/extension_error_overlay.css
+++ b/chrome/browser/resources/extensions/extension_error_overlay.css
@@ -15,37 +15,19 @@
   flex: none;
 }
 
-#extension-error-overlay .highlighted-source {
+#extension-error-overlay .extension-code-highlighted-source {
   background-color: rgba(255, 195, 200, 255);
 }
 
 #extension-error-overlay-code {
- -webkit-margin-after: 10px;
-  border: 1px solid #ccc;
-  display: flex;
-  font-family: monospace;
+  -webkit-margin-after: 10px;
   font-size: 1.2em;
-  overflow: auto;
-  white-space: pre;
-}
-
-#extension-error-overlay-code > * {
-  padding: 5px;
 }
 
-#extension-error-overlay-source {
+#extension-error-overlay .extension-code-source {
   color: #555;
 }
 
-#extension-error-overlay-line-numbers {
-  align-self: flex-start;
-  background-color: rgba(240, 240, 240, 1);
-  border-right: 1px solid #ccc;
-  color: rgba(128, 128, 128, 1);
-  flex-shrink: 0;
-  text-align: right;
-}
-
 .extension-error-overlay-context {
   -webkit-margin-after: 10px;
   font-size: 1.1em;