Reskins the Compact and System VK to look closer to the IME VK.

ui/keyboard/resources/elements/kb-keyboard.html

Index: ui/keyboard/resources/elements/kb-keyboard.html
diff --git a/ui/keyboard/resources/elements/kb-keyboard.html b/ui/keyboard/resources/elements/kb-keyboard.html
index 4d32229d47b269cd48ff4649efc4ef85f1a47f7a..b0b3ca6f15ed0c8d55a6983051c4a4d98e00baa5 100644
--- a/ui/keyboard/resources/elements/kb-keyboard.html
+++ b/ui/keyboard/resources/elements/kb-keyboard.html
@@ -15,8 +15,7 @@
     <style>
       :host {
         -webkit-user-select: none;
-        background-image: -webkit-linear-gradient(#282828, #000000);
-        background-size: cover;
+        background-color: #eeeeee;
         bottom: 0;
         cursor: default;
         left: 0;