Update Virtual Keybaord icons.

ui/keyboard/keyboard_util.cc

Index: ui/keyboard/keyboard_util.cc
diff --git a/ui/keyboard/keyboard_util.cc b/ui/keyboard/keyboard_util.cc
index 1e06795bdcea3381c1382253d5a4898d3c19233c..db164481c4d851b7a79f6d4a299aa77d40698438 100644
--- a/ui/keyboard/keyboard_util.cc
+++ b/ui/keyboard/keyboard_util.cc
@@ -266,7 +266,7 @@ const GritResourceMap* GetKeyboardExtensionResources(size_t* size) {
   static const GritResourceMap kKeyboardResources[] = {
     {"keyboard/layouts/function-key-row.html", IDR_KEYBOARD_FUNCTION_KEY_ROW},
     {"keyboard/images/back.svg", IDR_KEYBOARD_IMAGES_BACK},
-    {"keyboard/images/backspace.svg", IDR_KEYBOARD_IMAGES_BACKSPACE},
+    {"keyboard/images/backspace.png", IDR_KEYBOARD_IMAGES_BACKSPACE},
     {"keyboard/images/brightness-down.svg",
         IDR_KEYBOARD_IMAGES_BRIGHTNESS_DOWN},
     {"keyboard/images/brightness-up.svg", IDR_KEYBOARD_IMAGES_BRIGHTNESS_UP},
@@ -274,7 +274,7 @@ const GritResourceMap* GetKeyboardExtensionResources(size_t* size) {
     {"keyboard/images/down.svg", IDR_KEYBOARD_IMAGES_DOWN},
     {"keyboard/images/forward.svg", IDR_KEYBOARD_IMAGES_FORWARD},
     {"keyboard/images/fullscreen.svg", IDR_KEYBOARD_IMAGES_FULLSCREEN},
-    {"keyboard/images/hide-keyboard.svg", IDR_KEYBOARD_IMAGES_HIDE_KEYBOARD},
+    {"keyboard/images/hide-keyboard.png", IDR_KEYBOARD_IMAGES_HIDE_KEYBOARD},
     {"keyboard/images/keyboard.svg", IDR_KEYBOARD_IMAGES_KEYBOARD},
     {"keyboard/images/left.svg", IDR_KEYBOARD_IMAGES_LEFT},
     {"keyboard/images/microphone.svg", IDR_KEYBOARD_IMAGES_MICROPHONE},
@@ -282,13 +282,13 @@ const GritResourceMap* GetKeyboardExtensionResources(size_t* size) {
         IDR_KEYBOARD_IMAGES_MICROPHONE_GREEN},
     {"keyboard/images/mute.svg", IDR_KEYBOARD_IMAGES_MUTE},
     {"keyboard/images/reload.svg", IDR_KEYBOARD_IMAGES_RELOAD},
-    {"keyboard/images/return.svg", IDR_KEYBOARD_IMAGES_RETURN},
+    {"keyboard/images/return.png", IDR_KEYBOARD_IMAGES_RETURN},
     {"keyboard/images/right.svg", IDR_KEYBOARD_IMAGES_RIGHT},
     {"keyboard/images/search.svg", IDR_KEYBOARD_IMAGES_SEARCH},
     {"keyboard/images/shift.svg", IDR_KEYBOARD_IMAGES_SHIFT},
     {"keyboard/images/shift-filled.svg", IDR_KEYBOARD_IMAGES_SHIFT_FILLED},
     {"keyboard/images/shutdown.svg", IDR_KEYBOARD_IMAGES_SHUTDOWN},
-    {"keyboard/images/tab.svg", IDR_KEYBOARD_IMAGES_TAB},
+    {"keyboard/images/tab.png", IDR_KEYBOARD_IMAGES_TAB},
     {"keyboard/images/up.svg", IDR_KEYBOARD_IMAGES_UP},
     {"keyboard/images/volume-down.svg", IDR_KEYBOARD_IMAGES_VOLUME_DOWN},
     {"keyboard/images/volume-up.svg", IDR_KEYBOARD_IMAGES_VOLUME_UP},