Ensure that Helvetica, if installed, is used instead of Arial. This should be...

chrome/browser/resources/about_memory.html

Index: chrome/browser/resources/about_memory.html
===================================================================
--- chrome/browser/resources/about_memory.html	(revision 30053)
+++ chrome/browser/resources/about_memory.html	(working copy)
@@ -10,7 +10,7 @@
 <style>
 body {
   font-size: 84%;
-  font-family: Arial, Helvetica, sans-serif;
+  font-family: Helvetica, Arial, sans-serif;
   padding: 0.75em;
   margin: 0;
   min-width: 45em;
@@ -90,7 +90,7 @@
 }
 div#header select {
   font-size: 100%;
-  font-family: Arial, Helvetica, sans-serif;
+  font-family: Helvetica, Arial, sans-serif;
   border: 1px solid #3a75bd;
   line-height: 140%;
   color: #315d94;
@@ -126,7 +126,7 @@
   padding: 0 0.5em;
 }
 div.viewOptions input {
-  font-family: Arial, Helvetica, sans-serif;
+  font-family: Helvetica, Arial, sans-serif;
   font-size: 100%;
   border: 1px solid #b5b5b5;
   -webkit-border-radius: 6px;
@@ -315,7 +315,7 @@
   margin: 0.6em 0;
 }
 div.otherbrowsers {
-  font-family: Arial, Helvetica, sans-serif;
+  font-family: Helvetica, Arial, sans-serif;
   font-size: 84%;
   width: 100%;
   text-align: center;