[Passwords] Applied different styling for icon on dark theme

This change adds different dark theme styling for icon which indicates
exesting of compromised passwords on password check and passwords
section.

Bug: 1047726
Change-Id: I555c1fd1fcc37b71dd65ce3d1ef09c2d6729c24a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2128074
Commit-Queue: Viktor Semeniuk <vsemeniuk@google.com>
Reviewed-by: Jan Wilken Dörrie <jdoerrie@chromium.org>
Cr-Commit-Position: refs/heads/master@{#755295}

chrome/browser/resources/settings/autofill_page/password_check.html

@@ -47,6 +47,15 @@
         padding-top: 4px;
       }
 
+      @media (prefers-color-scheme: dark) {
+        iron-icon.has-leaks {
+          --iron-icon-fill-color: var(--google-red-refresh-300);
+          background: radial-gradient(circle 12px at 12px,
+                                    var(--google-grey-900) 100%,
+                                    transparent 100%);
+        }
+      }
+
       iron-icon.no-leaks {
         --iron-icon-fill-color: var(--google-blue-600);
         background-size: 16px 16px;
@@ -70,7 +79,6 @@
     <div class="settings-box first two-line" id="leakCheckHeader">
       <!-- If the password check concluded, show only a status Icon. -->
       <template is="dom-if" if="[[!isCheckInProgress_(status_)]]">
-        <!--TODO(https://crbug.com/1047726) add background to icon-->
         <iron-icon class$="[[getStatusIconClass_(status_, leakedPasswords)]]"
                    icon="[[getStatusIcon_(status_, leakedPasswords)]]">
         </iron-icon>

chrome/browser/resources/settings/autofill_page/passwords_section.html

@@ -82,7 +82,15 @@
         padding-inline-start: 4px;
         padding-top: 4px;
         width: 16px;
+      }
 
+      @media (prefers-color-scheme: dark) {
+        #checkPasswordsLinkRow iron-icon {
+          --iron-icon-fill-color: var(--google-red-refresh-300);
+          background: radial-gradient(circle 12px at 12px,
+                                    var(--google-grey-900) 100%,
+                                    transparent 100%);
+        }
       }
    </style>
     <settings-toggle-button id="passwordToggle"