WebUI NTP: fix logo shrinking when it is larger than min-height

Bug: 1091367
Change-Id: I8283c28f0bdbb2b1fa87bdab76e2dc508ff6bdb3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2231291
Commit-Queue: Esmael Elmoslimany <aee@chromium.org>
Commit-Queue: Tibor Goldschwendt <tiborg@chromium.org>
Auto-Submit: Esmael Elmoslimany <aee@chromium.org>
Reviewed-by: Tibor Goldschwendt <tiborg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#775241}

chrome/browser/resources/new_tab_page/logo.html

@@ -2,6 +2,7 @@
   :host {
     --ntp-logo-height: 230px;
     display: inline-block;
+    flex-shrink: 0;
     min-height: var(--ntp-logo-height);
   }
 
@@ -83,7 +84,7 @@
   </template>
 </dom-if>
 <dom-if if="[[showDoodle_]]" restamp>
-  <template> 
+  <template>
     <div id="doodle" title="[[doodle_.description]]">
       <div id="imageContainer" hidden="[[!doodle_.content.imageDoodle]]"
           tabindex="1" on-click="onImageClick_" on-keydown="onImageKeydown_">