Print photos in full resolution from the Photo Editor

chrome/browser/resources/file_manager/css/gallery.css

 /* Copyright (c) 2012 The Chromium Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file. */
 
 body {
   -webkit-user-select: none;
   font-family: Open Sans, Droid Sans Fallback, sans-serif;
   font-size: 84%;
   margin: 0;
 }
@@ skipping 93 matching lines @@
   -webkit-transition-property: -webkit-transform, opacity;
   -webkit-transition-timing-function: ease-in-out;
   pointer-events: none;
   position: absolute;
 }
 
 .gallery > .image-container > .image[fade] {
   opacity: 0;
 }
 
+/* Full resolution image is invisible unless printing. */
+.gallery > .image-container > canvas.fullres {
+  display: none;
+}
+
+@media print {
+  /* Do not print anything but the image. */
+  .gallery > :not(.image-container) {
+    display: none !important;
+  }
+
+  /* Center the printed image. */
+  .gallery > .image-container {
+    -webkit-box-align: center;
+    -webkit-box-orient: horizontal;
+    -webkit-box-pack: center;
+    display: -webkit-box;
+  }
+
+  /* Do not print the screen resolution image. */
+  .gallery > .image-container > canvas.image {
+    display: none !important;
+  }
+
+  /* Print the full resolution image instead. */
+  .gallery > .image-container > canvas.fullres {
+    display: block !important;
+    max-height: 100%;
+    max-width: 100%;
+  }
+
+  /* Print video at the center of the page */
+  .gallery > .image-container > video.image {
+    position: auto !important;
+  }
+}
+
 /* Toolbar */
 
 .gallery > .toolbar {
   -webkit-box-align: stretch;
   -webkit-box-orient: horizontal;
   -webkit-box-pack: start;
   -webkit-transform: translate(0, 0);
   -webkit-transition-duration: 300ms;
   -webkit-transition-property: webkit-transform, opacity;
   -webkit-transition-timing-function: ease;
@@ skipping 881 matching lines @@
     max-height: 100%;
     max-width: 100%;
     object-fit: contain;
     top: 0 !important;
   }
 
   .gallery .tool {
     opacity: 0 !important;
   }
 }