Remove hard-coded font families in WebUI.

chrome/browser/resources/local_ntp/local_ntp.css

Index: chrome/browser/resources/local_ntp/local_ntp.css
diff --git a/chrome/browser/resources/local_ntp/local_ntp.css b/chrome/browser/resources/local_ntp/local_ntp.css
index 419eb229a97c94b33964c4c6a81bd3d3e085e8f0..90ea8847151b2dd898311a0f397cd3ab01790c42 100644
--- a/chrome/browser/resources/local_ntp/local_ntp.css
+++ b/chrome/browser/resources/local_ntp/local_ntp.css
@@ -5,8 +5,6 @@ body {
   background-attachment: fixed !important;
   background-color: white;
   cursor: default;
-  font-family: arial, sans-serif;
-  font-size: small;
   margin: 0;
   overflow-x: hidden;
 }
@@ -105,7 +103,6 @@ html[dir=rtl] #fakebox > input {
 #fakebox-text {
   bottom: 0;
   color: #bbb;
-  font-family: arial, sans-serif;
   font-size: 16px;
   left: 9px;
   margin-top: 1px;
@@ -691,7 +688,6 @@ html[dir=rtl] #attribution {
   bottom: 0;
   color: rgb(17, 85, 204);
   cursor: pointer;
-  font-family: Arial;
   font-size: 14px;
   opacity: 0.9;
   padding: 3px;