Make it more obvious when our backing store has failed us.

base/gfx/gtk_util.cc

 // Copyright (c) 2009 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 "base/gfx/gtk_util.h"
 
 #include <gdk/gdk.h>
 #include <gtk/gtk.h>
 
 #include "base/gfx/rect.h"
 #include "skia/include/SkBitmap.h"
 
 namespace gfx {
 
 const GdkColor kGdkWhite = GDK_COLOR_RGB(0xff, 0xff, 0xff);
 const GdkColor kGdkBlack = GDK_COLOR_RGB(0x00, 0x00, 0x00);
+GdkColor kGdkSeafoamGreen = GDK_COLOR_RGB(0x0, 0xff, 0x80);
 
 void SubtractRectanglesFromRegion(GdkRegion* region,
                                   const std::vector<Rect>& cutouts) {
   for (size_t i = 0; i < cutouts.size(); ++i) {
     GdkRectangle rect = cutouts[i].ToGdkRectangle();
     GdkRegion* rect_region = gdk_region_rectangle(&rect);
     gdk_region_subtract(region, rect_region);
     // TODO(deanm): It would be nice to be able to reuse the GdkRegion here.
     gdk_region_destroy(rect_region);
   }
@@ skipping 45 matching lines @@
   GtkWidget* ebox = gtk_event_box_new();
   gtk_widget_modify_bg(ebox, GTK_STATE_NORMAL, color);
   GtkWidget* alignment = gtk_alignment_new(0, 0, 1, 1);
   gtk_alignment_set_padding(GTK_ALIGNMENT(alignment), top, bottom, left, right);
   gtk_container_add(GTK_CONTAINER(alignment), child);
   gtk_container_add(GTK_CONTAINER(ebox), alignment);
   return ebox;
 }
 
 }  // namespace gfx