Gtk3: Fix border colors on Gtk3.20

chrome/browser/ui/libgtkui/gtk_util.cc

 // 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.
 
 #include "chrome/browser/ui/libgtkui/gtk_util.h"
 
 #include <dlfcn.h>
 #include <gdk/gdk.h>
 #include <gdk/gdkx.h>
 #include <gtk/gtk.h>
@@ skipping 495 matching lines @@
   if ((border_style == GTK_BORDER_STYLE_NONE ||
        border_style == GTK_BORDER_STYLE_HIDDEN) ||
       (!border.left && !border.right && !border.top && !border.bottom)) {
     return SK_ColorTRANSPARENT;
   }
 
   AddBorders(context);
   gfx::Size size = GetMinimumWidgetSize(context);
   CairoSurface surface(size);
   RenderBackground(size, surface.cairo(), context);
-  gtk_render_frame(context, surface.cairo(), 0, 0, 1, 1);
+  gtk_render_frame(context, surface.cairo(), 0, 0, size.width(), size.height());
   return surface.GetAveragePixelValue(true);
 }
 
 SkColor GetSeparatorColor(const char* css_selector) {
   if (!GtkVersionCheck(3, 20))
     return GetFgColor(css_selector);
 
   // Some themes use borders to render separators, others use a
   // background color.  Only return the border color if there is one.
   SkColor border = GetBorderColor(css_selector);
   if (SkColorGetA(border))
     return border;
 
   return GetBgColor(css_selector);
 }
 #endif
 
 }  // namespace libgtkui