NTPResourceCache don't add substitution for colorSectionBorder twice

chrome/browser/ui/webui/ntp/ntp_resource_cache.cc

Index: chrome/browser/ui/webui/ntp/ntp_resource_cache.cc
diff --git a/chrome/browser/ui/webui/ntp/ntp_resource_cache.cc b/chrome/browser/ui/webui/ntp/ntp_resource_cache.cc
index 21df0d4bdfc38284e786976630d3262ad46bebf0..e9f9d45e970fd3f2a1eb026b849ade3999bf1c8e 100644
--- a/chrome/browser/ui/webui/ntp/ntp_resource_cache.cc
+++ b/chrome/browser/ui/webui/ntp/ntp_resource_cache.cc
@@ -576,8 +576,6 @@ void NTPResourceCache::CreateNewTabCSS() {
   substitutions["backgroundBarAttached"] = GetNewTabBackgroundCSS(tp, true);
   substitutions["backgroundTiling"] = GetNewTabBackgroundTilingCSS(tp);
   substitutions["colorTextRgba"] = SkColorToRGBAString(color_text);
-  substitutions["colorSectionBorder"] =
-      SkColorToRGBAString(color_section_border);
   substitutions["colorTextLight"] = SkColorToRGBAString(color_text_light);
   substitutions["colorSectionBorder"] =
       SkColorToRGBComponents(color_section_border);