Gtk3: Fix GtkTextView colors

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 474 matching lines @@
 SkColor GetBorderColor(const char* css_selector) {
   // Borders have the same issue as backgrounds, due to the
   // border-image property.
   auto context = GetStyleContextFromCss(css_selector);
   gfx::Size size(24, 24);
   CairoSurface surface(size);
   gtk_render_frame(context, surface.cairo(), 0, 0, size.width(), size.height());
   return surface.GetAveragePixelValue(true);
 }
 
-ScopedStyleContext GetSelectedStyleContext(const char* css_selector) {
+SkColor GetSelectionBgColor(const char* css_selector) {
   auto context = GetStyleContextFromCss(css_selector);
-  if (GtkVersionCheck(3, 20)) {
-    context = AppendCssNodeToStyleContext(context, "#selection");
-  } else {
-    GtkStateFlags state = gtk_style_context_get_state(context);
-    state = static_cast<GtkStateFlags>(state | GTK_STATE_FLAG_SELECTED);
-    gtk_style_context_set_state(context, state);
-  }
-  return context;
-}
-
-SkColor GetSelectedTextColor(const char* css_selector) {
-  return GetFgColorFromStyleContext(GetSelectedStyleContext(css_selector));
-}
-
-SkColor GetSelectedBgColor(const char* css_selector) {
-  auto context = GetSelectedStyleContext(css_selector);
   if (GtkVersionCheck(3, 20))
     return GetBgColorFromStyleContext(context);
   // This is verbatim how Gtk gets the selection color on versions before 3.20.
   GdkRGBA selection_color;
   G_GNUC_BEGIN_IGNORE_DEPRECATIONS;
   gtk_style_context_get_background_color(
       context, gtk_style_context_get_state(context), &selection_color);
   G_GNUC_END_IGNORE_DEPRECATIONS;
   return GdkRgbaToSkColor(selection_color);
 }
@@ skipping 24 matching lines @@
   }
 
   CairoSurface surface(gfx::Size(w, h));
   gtk_render_background(context, surface.cairo(), 0, 0, w, h);
   gtk_render_frame(context, surface.cairo(), 0, 0, w, h);
   return surface.GetAveragePixelValue(false);
 }
 #endif
 
 }  // namespace libgtkui