Update Virtual Keybaord icons.

ui/keyboard/resources/images/return.svg

Index: ui/keyboard/resources/images/return.svg
diff --git a/ui/keyboard/resources/images/return.svg b/ui/keyboard/resources/images/return.svg
deleted file mode 100644
index d83cc06f9692d94ed1479d6ad55cf5237d845745..0000000000000000000000000000000000000000
--- a/ui/keyboard/resources/images/return.svg
+++ /dev/null
@@ -1,16 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- Generator: Adobe Illustrator 16.0.0, SVG Export Plug-In . SVG Version: 6.00 Build 0)  -->
-<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
-<svg version="1.1"
-	 id="svg6103" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:cc="http://creativecommons.org/ns#" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:svg="http://www.w3.org/2000/svg" xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd" xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape" sodipodi:docname="New document 17" inkscape:version="0.48.3.1 r9886"
-	 xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px" width="48px" height="48px"
-	 viewBox="0 0 48 48" enable-background="new 0 0 48 48" xml:space="preserve">
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-<g id="layer1" inkscape:groupmode="layer" inkscape:label="Layer 1">
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-</svg>