Update signout icon and more_settings icon on the md shelf

chrome/browser/resources/chromeos/login/images/2x/signout.svg

Index: chrome/browser/resources/chromeos/login/images/2x/signout.svg
diff --git a/chrome/browser/resources/chromeos/login/images/2x/signout.svg b/chrome/browser/resources/chromeos/login/images/2x/signout.svg
new file mode 100644
index 0000000000000000000000000000000000000000..9717d8d735d42abe50b926835345985a15fe1528
--- /dev/null
+++ b/chrome/browser/resources/chromeos/login/images/2x/signout.svg
@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg width="40px" height="40px" viewBox="0 0 40 40" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+    <!-- Generator: Sketch 41.1 (35376) - http://www.bohemiancoding.com/sketch -->
+    <title>sign_out-2x</title>
+    <desc>Created with Sketch.</desc>
+    <defs></defs>
+    <g id="Final" stroke="none" stroke-width="1" fill="none" fill-rule="evenodd">
+        <g id="Start-screen-icons" transform="translate(-122.000000, -312.000000)">
+            <g id="sign_out" transform="translate(122.000000, 312.000000)">
+                <polygon id="Layout" points="0 0 40 0 40 40 0 40"></polygon>
+                <path d="M19.4814816,29 L28,20.5 L19.4814815,12 L17,14.5 L21.5,19 L5,19 L5,22 L21.5,22 L17,26.5 L19.4814816,29 Z M8.33333333,5 C6.48333333,5 5,6.5 5,8.33333333 L5,15 L8,15 L8,8.00561523 L32,8.00561523 L32,32.0273438 L8,32.0273438 L8,26 L5,26 L5,31.6666667 C5,33.5 6.48333333,35 8.33333333,35 L31.6666667,35 C33.5,35 35,33.5 35,31.6666667 L35,8.33333333 C35,6.5 33.5,5 31.6666667,5 L8.33333333,5 Z" id="Shape" fill="#FFFFFF"></path>
+            </g>
+        </g>
+    </g>
+</svg>