Added @media print rules to gallery.css to make the picture look better on a printed page

BUG=

Review URL: https://chromiumcodereview.appspot.com/10828155

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@149860 0039d316-1c4b-4281-b951-d872f2087c98

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

@@ -915,7 +915,7 @@ body {
 /* Load spinner and error banner */
 
 .gallery .spinner {
-  background-image: url('../images/common/spinner_white.svg);
+  background-image: url('../images/common/spinner_white.svg');
   background-size: 100%;
   height: 32px;
   left: 50%;
@@ -998,3 +998,17 @@ body {
 .gallery[video] > .toolbar .edit-bar {
   display: none;
 }
+
+@media print {
+  .image-container > .image {
+    left: 0 !important;
+    max-height: 100%;
+    max-width: 100%;
+    object-fit: contain;
+    top: 0 !important;
+  }
+
+  .gallery .tool {
+    opacity: 0 !important;
+  }
+}