NOT FOR REVIEW: Fullscreen WIP

third_party/WebKit/Source/core/css/fullscreen.css

Index: third_party/WebKit/Source/core/css/fullscreen.css
diff --git a/third_party/WebKit/Source/core/css/fullscreen.css b/third_party/WebKit/Source/core/css/fullscreen.css
index f6a773a73e17bf7a0a5399429012a6d612dd3803..82cf84e0c89b43fee5a9e153794aeef20dfbf267 100644
--- a/third_party/WebKit/Source/core/css/fullscreen.css
+++ b/third_party/WebKit/Source/core/css/fullscreen.css
@@ -1,61 +1,35 @@
-:-webkit-full-screen {
-    background-color: white;
-    z-index: 2147483647 !important;
-}
-
-:root:-webkit-full-screen-ancestor {
-    overflow: hidden !important;
-}
-
-:-webkit-full-screen-ancestor:not(iframe) {
-    z-index: auto !important;
-    position: static !important;
-    opacity: 1 !important;
-    transform: none !important;
-    -webkit-mask: none !important;
-    clip: none !important;
-    -webkit-filter: none !important;
-    transition: none !important;
-    -webkit-box-reflect: none !important;
-    -webkit-perspective: none !important;
-    -webkit-transform-style: flat !important;
-    will-change: auto !important;
-}
-
-video:-webkit-full-screen, audio:-webkit-full-screen {
-    background-color: transparent !important;
-    position: relative !important;
+:not(:root):-webkit-full-screen {
+    position: fixed !important;
+    top: 0 !important;
+    right: 0 !important;
+    bottom: 0 !important;
     left: 0 !important;
-    top: 0 ! important;
     margin: 0 !important;
+    box-sizing: border-box !important;
     min-width: 0 !important;
     max-width: none !important;
     min-height: 0 !important;
     max-height: none !important;
     width: 100% !important;
     height: 100% !important;
-    flex: 1 !important;
-    display: block !important;
     transform: none !important;
-}
 
-img:-webkit-full-screen {
-    width: auto;
-    height: 100%;
-    max-width: 100%;
+    /* intentionally not !important */
+    object-fit: contain;
 }
 
 iframe:-webkit-full-screen {
-    margin: 0 !important;
+    border: none !important;
     padding: 0 !important;
-    border: 0 !important;
-    position: fixed !important;
-    min-width: 0 !important;
-    max-width: none !important;
-    min-height: 0 !important;
-    max-height: none !important;
-    width: 100% !important;
-    height: 100% !important;
-    left: 0 !important;
-    top: 0 !important;
+}
+
+/* TODO(foolip): In the spec, there's a ::backdrop block with the properties
+   shared with dialog::backdrop (see html.css). */
+:not(:root):-webkit-full-screen::backdrop {
+    position: fixed;
+    top: 0;
+    right: 0;
+    bottom: 0;
+    left: 0;
+    background: black;
 }