Setup field trial for one-click signin inforbar.

chrome/browser/ui/views/infobars/infobar_background.cc

Index: chrome/browser/ui/views/infobars/infobar_background.cc
diff --git a/chrome/browser/ui/views/infobars/infobar_background.cc b/chrome/browser/ui/views/infobars/infobar_background.cc
index 91445789fbddf415559f7d613079ba4c387156f8..4300aa703b5ca77a7de3d3987b9f921fbdccaa94 100644
--- a/chrome/browser/ui/views/infobars/infobar_background.cc
+++ b/chrome/browser/ui/views/infobars/infobar_background.cc
@@ -15,13 +15,22 @@ InfoBarBackground::InfoBarBackground(InfoBarDelegate::Type infobar_type)
     : separator_color_(SK_ColorBLACK),
       top_color_(GetInfoBarTopColor(infobar_type)),
       bottom_color_(GetInfoBarBottomColor(infobar_type)) {
-  SetNativeControlColor(
-      color_utils::AlphaBlend(top_color_, bottom_color_, 128));
+  Init();
+}
+
+InfoBarBackground::InfoBarBackground(SkColor top, SkColor bottom)
+    : separator_color_(SK_ColorBLACK), top_color_(top), bottom_color_(bottom) {
+  Init();
 }
 
 InfoBarBackground::~InfoBarBackground() {
 }
 
+void InfoBarBackground::Init() {
+  SetNativeControlColor(
+      color_utils::AlphaBlend(top_color_, bottom_color_, 128));
+}
+
 void InfoBarBackground::Paint(gfx::Canvas* canvas, views::View* view) const {
   SkPoint gradient_points[2];
   gradient_points[0].iset(0, 0);