Give the TabContentsContainer a white background so the user will

chrome/browser/gtk/browser_window_gtk.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 "chrome/browser/gtk/browser_window_gtk.h"
 
 #include <gdk/gdkkeysyms.h>
 #include <X11/XF86keysym.h>
 
 #include <string>
@@ skipping 1702 matching lines @@
       prefs::kDevToolsSplitLocation);
   if (split_offset != -1) {
     gtk_paned_set_position(GTK_PANED(contents_split_), split_offset);
   } else {
     gtk_widget_set_size_request(devtools_container_->widget(), -1,
                                 kDefaultDevToolsHeight);
   }
   gtk_widget_show_all(render_area_vbox_);
   gtk_widget_hide(devtools_container_->widget());
   render_area_event_box_ = gtk_event_box_new();
+  // Set a white background so during startup the user sees white in the
+  // content area before we get a TabContents in place.
+  gtk_widget_modify_bg(render_area_event_box_, GTK_STATE_NORMAL,
+                       &gfx::kGdkWhite);
   gtk_container_add(GTK_CONTAINER(render_area_event_box_), render_area_vbox_);
   gtk_widget_show(render_area_event_box_);
   gtk_box_pack_end(GTK_BOX(window_vbox_), render_area_event_box_,
                    TRUE, TRUE, 0);
 
   if (IsBookmarkBarSupported()) {
     bookmark_bar_.reset(new BookmarkBarGtk(this,
                                            browser_->profile(),
                                            browser_.get(),
                                            tabstrip_.get()));
@@ skipping 86 matching lines @@
   }
 
   SkColor frame_color = theme_provider->GetColor(frame_color_id);
 
   // Paint the frame color on the left, right and bottom.
   GdkColor frame_color_gdk = SkColorToGdkColor(frame_color);
   gtk_widget_modify_bg(GTK_WIDGET(window_), GTK_STATE_NORMAL,
                        &frame_color_gdk);
 
   // Set the color of the dev tools divider.
-  gtk_widget_modify_bg(render_area_event_box_, GTK_STATE_NORMAL,
-                       &frame_color_gdk);
   gtk_widget_modify_bg(contents_split_, GTK_STATE_NORMAL, &frame_color_gdk);
 
   // When the cursor is over the divider, GTK+ normally lightens the background
   // color by 1.3 (see LIGHTNESS_MULT in gtkstyle.c).  Since we're setting the
   // color, override the prelight also.
   color_utils::HSL hsl = { -1, 0.5, 0.65 };
   SkColor frame_prelight_color = color_utils::HSLShift(frame_color, hsl);
   GdkColor frame_prelight_color_gdk = SkColorToGdkColor(frame_prelight_color);
   gtk_widget_modify_bg(contents_split_, GTK_STATE_PRELIGHT,
       &frame_prelight_color_gdk);
@@ skipping 457 matching lines @@
   // are taken from the WMs' source code.
   return (wm_name == "Blackbox" ||
           wm_name == "compiz" ||
           wm_name == "e16" ||  // Enlightenment DR16
           wm_name == "KWin" ||
           wm_name == "Metacity" ||
           wm_name == "Mutter" ||
           wm_name == "Openbox" ||
           wm_name == "Xfwm4");
 }