Use new labs_section on about:labs

chrome/browser/resources/labs.html

Index: chrome/browser/resources/labs.html
diff --git a/chrome/browser/resources/labs.html b/chrome/browser/resources/labs.html
index ccb472829e39a9e11491dcc14580c9214dc815f7..3e638ff79387165b0a94f01b9adb197ba1811dbb 100644
--- a/chrome/browser/resources/labs.html
+++ b/chrome/browser/resources/labs.html
@@ -29,7 +29,7 @@ html[dir=rtl] #header {
 }
 
 #header h1 {
-  background: url('../../app/theme/extensions_section.png') 0px 20px no-repeat;
+  background: url('../../app/theme/labs_section.png') 0px 20px no-repeat;
   display: inline;
   margin: 0;
   padding-bottom: 43px;
@@ -38,7 +38,7 @@ html[dir=rtl] #header {
 }
 
 html[dir=rtl] #header h1 {
-  background: url('../../app/theme/extensions_section.png') right no-repeat;
+  background: url('../../app/theme/labs_section.png') right no-repeat;
   padding-right: 95px;
   padding-left: 0;
 }