Update Virtual Keybaord icons.

ui/keyboard/resources/layouts/system-qwerty.html

Index: ui/keyboard/resources/layouts/system-qwerty.html
diff --git a/ui/keyboard/resources/layouts/system-qwerty.html b/ui/keyboard/resources/layouts/system-qwerty.html
index 2340fd94093d240319f22de31e88d0ab9511d6b4..983d7ac5d5eb52c35c839cc703e673e3b404d473 100644
--- a/ui/keyboard/resources/layouts/system-qwerty.html
+++ b/ui/keyboard/resources/layouts/system-qwerty.html
@@ -9,12 +9,12 @@
     <kb-key-sequence invert=true keys="`1234567890-="
         hintTexts="~!@#$%^&*()_+"> </kb-key-sequence>
     <kb-key class="dark" char="&#x0008;" repeat align="right"
-        image="backspace" sound="keypress-delete" stretch weight="190">
+        image="backspace.png" sound="keypress-delete" stretch weight="190">
     </kb-key>
   </kb-row>
   <kb-row align="left">
     <kb-key class="dark" char="&#x0009;" align="center"
-        image="tab" weight="155"></kb-key>
+        image="tab.png" weight="155"></kb-key>
     <kb-key-sequence keys="QWERTYUIOP"></kb-key-sequence>
     <kb-key-sequence invert=true keys="[]\"
         hintTexts="{}|"></kb-key-sequence>
@@ -26,7 +26,7 @@
     <kb-key-sequence invert=true keys=";&apos;" hintTexts=':"'>
     </kb-key-sequence>
     <kb-key class="dark" char="&#x000A;" align="right"
-        image="return" sound="keypress-return" stretch weight="170"></kb-key>
+        image="return.png" sound="keypress-return" stretch weight="170"></kb-key>
   </kb-row>
   <kb-row>
     <kb-shift-key weight="265" align="left"></kb-shift-key>
@@ -41,6 +41,7 @@
     <kb-modifier-key class="dark" stretch weight="150" char="Alt"
         align="left">alt</kb-modifier-key>
     <kb-key char=" " class="space" sound="keypress-spacebar" weight="760">
+    English (US)
     </kb-key>
     <kb-key class="cursor dark" repeat char="Arrow-Left" image="left"
         weight="75"> </kb-key>
@@ -50,7 +51,7 @@
         weight="75"> </kb-key>
     <kb-key class="cursor dark" repeat char="Arrow-Right" image="right"
         weight="75"></kb-key>
-    <kb-hide-keyboard-key image="hide-keyboard" stretch>
+    <kb-hide-keyboard-key image="hide-keyboard.png" stretch>
     </kb-hide-keyboard-key>
   </kb-row>
   <kb-altkey-container hidden>
@@ -62,12 +63,12 @@
     <kb-key-sequence keys="`1234567890-=" hintTexts="~!@#$%^&*()_+">
     </kb-key-sequence>
     <kb-key class="dark" weight="190" char="&#x0008;"
-        image="backspace" repeat sound="keypress-delete" stretch
+        image="backspace.png" repeat sound="keypress-delete" stretch
         align="right"></kb-key>
   </kb-row>
   <kb-row align="left">
     <kb-key class="dark" char="&#x0009;" align="center"
-        image="tab" weight="155"></kb-key>
+        image="tab.png" weight="155"></kb-key>
     <kb-key-sequence keys="qwertyuiop"></kb-key-sequence>
     <kb-key-sequence keys="[]\" hintTexts="{}|"></kb-key-sequence>
   </kb-row>
@@ -77,7 +78,8 @@
     <kb-key-sequence keys="asdfghjkl"></kb-key-sequence>
     <kb-key-sequence keys=";&apos;" hintTexts=':"'></kb-key-sequence>
     <kb-key class="dark" char="&#x000A;" align="right"
-        image="return" sound="keypress-return" stretch weight="170"></kb-key>
+        image="return.png" sound="keypress-return" stretch weight="170">
+    </kb-key>
   </kb-row>
   <kb-row>
     <kb-shift-key weight="265" align="left"></kb-shift-key>
@@ -91,6 +93,7 @@
     <kb-modifier-key class="symbol dark" stretch weight="150" char="Alt"
         align="left">alt</kb-modifier-key>
     <kb-key char=" " sound="keypress-spacebar" class="space" weight="760">
+    English (US)
     </kb-key>
     <kb-key class="cursor dark" repeat char="Arrow-Left" image="left"
         weight="75"> </kb-key>
@@ -100,7 +103,7 @@
         weight="75"> </kb-key>
     <kb-key class="cursor dark" repeat char="Arrow-Right" image="right"
         weight="75"></kb-key>
-    <kb-hide-keyboard-key image="hide-keyboard" stretch>
+    <kb-hide-keyboard-key image="hide-keyboard.png" stretch>
     </kb-hide-keyboard-key>
   </kb-row>
   <kb-altkey-container hidden>