Gtk3: Rename Gtk2UI and Get[FB]GColor

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 <gdk/gdk.h>
 #include <gdk/gdkx.h>
 #include <gtk/gtk.h>
 #include <stddef.h>
@@ skipping 276 matching lines @@
     context = AppendNode(context, widget_type);
   }
   return context;
 }
 
 SkColor GdkRgbaToSkColor(const GdkRGBA& color) {
   return SkColorSetARGB(color.alpha * 255, color.red * 255, color.green * 255,
                         color.blue * 255);
 }
 
-SkColor GetFGColor(const char* css_selector) {
+SkColor GetFgColor(const char* css_selector) {
   auto context = GetStyleContextFromCss(css_selector);
   GdkRGBA color;
   gtk_style_context_get_color(context, gtk_style_context_get_state(context),
                               &color);
   return GdkRgbaToSkColor(color);
 }
 
 GtkCssProvider* GetCssProvider(const char* css) {
   GtkCssProvider* provider = gtk_css_provider_new();
   GError* error = nullptr;
@@ skipping 53 matching lines @@
   // Get the color value of the single pixel.
   SkColor GetPixelValue() {
     return *reinterpret_cast<SkColor*>(cairo_image_surface_get_data(surface_));
   }
 
  private:
   cairo_surface_t* surface_;
   cairo_t* cairo_;
 };
 
-SkColor GetBGColor(const char* css_selector) {
+SkColor GetBgColor(const char* css_selector) {
   // Backgrounds are more general than solid colors (eg. gradients),
   // but chromium requires us to boil this down to one color.  We
   // cannot use the background-color here because some themes leave it
   // set to a garbage color because a background-image will cover it
   // anyway.  So we instead render the background into a single pixel,
   // removing any borders, and hope that we get a good color.
   auto context = GetStyleContextFromCss(css_selector);
   RemoveBorders(context);
   PixelSurface surface;
   gtk_render_background(context, surface.cairo(), 0, 0, 1, 1);
@@ skipping 17 matching lines @@
   }
 
   AddBorders(context);
   PixelSurface surface;
   gtk_render_frame(context, surface.cairo(), 0, 0, 1, 1);
   return surface.GetPixelValue();
 }
 #endif
 
 }  // namespace libgtkui