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..e69ce4e8c75ac91d94043dc2f3729f02a4f60a33 100644
--- a/chrome/browser/resources/local_ntp/local_ntp.css
+++ b/chrome/browser/resources/local_ntp/local_ntp.css
@@ -5,7 +5,6 @@ body {
   background-attachment: fixed !important;
   background-color: white;
   cursor: default;
-  font-family: arial, sans-serif;

[jungshik at Google, 2014/12/16 20:44:00]

This is a tricky case. Local NTP these days has Google Web search box. So, it
should look like google.com which still uses 'Arial, sans-serif'. 

Add TODO comment saying it needs to be discussed with NTP folks and leave
local-ntp alone. 

   font-size: small;
   margin: 0;
   overflow-x: hidden;
@@ -105,7 +104,6 @@ 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 +689,6 @@ html[dir=rtl] #attribution {
   bottom: 0;
   color: rgb(17, 85, 204);
   cursor: pointer;
-  font-family: Arial;
   font-size: 14px;
   opacity: 0.9;
   padding: 3px;