Gtk3: Fix link color in 3.12 and later

chrome/browser/ui/libgtkui/gtk_util.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_UI_LIBGTKUI_GTK_UTIL_H_
 #define CHROME_BROWSER_UI_LIBGTKUI_GTK_UTIL_H_
 
 #include <gtk/gtk.h>
 #include <string>
 
@@ skipping 50 matching lines @@
 // it above |parent|. Do nothing if |parent| is NULL.
 void SetGtkTransientForAura(GtkWidget* dialog, aura::Window* parent);
 
 // Gets the transient parent aura window for |dialog|.
 aura::Window* GetAuraTransientParent(GtkWidget* dialog);
 
 // Clears the transient parent for |dialog|.
 void ClearAuraTransientParent(GtkWidget* dialog);
 
 #if GTK_MAJOR_VERSION > 2
+// These constants are defined in gtk/gtkenums.h in Gtk3.12 or later.
+// They are added here as a convenience to avoid version checks, and
+// can be removed once the sysroot is switched from Wheezy to Jessie.
+#define GTK_STATE_FLAG_LINK static_cast<GtkStateFlags>(1 << 9)
+#define GTK_STATE_FLAG_VISITED static_cast<GtkStateFlags>(1 << 10)
+#define GTK_STATE_FLAG_CHECKED static_cast<GtkStateFlags>(1 << 11)
+
 // Returns true iff the runtime version of Gtk used meets
 // |major|.|minor|.|micro|.
 bool GtkVersionCheck(int major, int minor = 0, int micro = 0);
 
 template <typename T>
 class ScopedGObject {
  public:
   explicit ScopedGObject(T* obj) : obj_(obj) {
     // Increase the reference count of |obj_|, removing the floating
     // reference if it has one.
@@ skipping 54 matching lines @@
 
 // If there is a border, renders the border from the style context
 // created by GetStyleContextFromCss(|css_selector|) into a single
 // pixel and returns the color.  Otherwise returns kInvalidColor.
 SkColor GetBorderColor(const char* css_selector);
 #endif
 
 }  // namespace libgtkui
 
 #endif  // CHROME_BROWSER_UI_LIBGTKUI_GTK_UTIL_H_