content: Start splitting up chrome/browser/ui/gtk/gtk_util.h

chrome/browser/ui/gtk/browser_titlebar.cc

Index: chrome/browser/ui/gtk/browser_titlebar.cc
diff --git a/chrome/browser/ui/gtk/browser_titlebar.cc b/chrome/browser/ui/gtk/browser_titlebar.cc
index 051c68e7614f009c9545d1d528e78ccf01942158..29b826ca6c9a9a0efb2f0318dc05eafd2b35f35f 100644
--- a/chrome/browser/ui/gtk/browser_titlebar.cc
+++ b/chrome/browser/ui/gtk/browser_titlebar.cc
@@ -46,6 +46,7 @@
 #include "grit/theme_resources.h"
 #include "grit/theme_resources_standard.h"
 #include "grit/ui_resources.h"
+#include "ui/base/gtk/gtk_hig_constants.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/gfx/gtk_util.h"
@@ -758,10 +759,10 @@ void BrowserTitlebar::UpdateTextColor() {
           ThemeService::COLOR_FRAME_INACTIVE);
     }
     GdkColor text_color = PickLuminosityContrastingColor(
-        &frame_color, &gtk_util::kGdkWhite, &gtk_util::kGdkBlack);
+        &frame_color, &ui::kGdkWhite, &ui::kGdkBlack);
     gtk_util::SetLabelColor(app_mode_title_, &text_color);
   } else {
-    gtk_util::SetLabelColor(app_mode_title_, &gtk_util::kGdkWhite);
+    gtk_util::SetLabelColor(app_mode_title_, &ui::kGdkWhite);
   }
 }