Fix a crash that happens when changing themes.

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 "app/resource_bundle.h"
@@ skipping 400 matching lines @@
   }
 
   // Draw the default background.
   // TODO(tc): Handle maximized windows.
   cairo_t* cr = gdk_cairo_create(GDK_DRAWABLE(widget->window));
   cairo_rectangle(cr, event->area.x, event->area.y, event->area.width,
                   event->area.height);
   cairo_clip(cr);
   NineBox* image = window->browser()->profile()->IsOffTheRecord()
       ? default_background_otr : default_background;
-  image->RenderTopCenterStrip(cr, event->area.x, 0, event->area.width);
+  image->RenderTopCenterStrip(cr, 0, 0, widget->allocation.width);
   cairo_destroy(cr);
 
   // TODO(tc): Draw the theme overlay.  The windows code is below.
   // if (theme_provider->HasCustomImage(IDR_THEME_FRAME_OVERLAY)) {
   //   SkBitmap* theme_overlay = theme_provider->GetBitmapNamed(
   //       IDR_THEME_FRAME_OVERLAY);
   //   canvas->DrawBitmapInt(*theme_overlay, 0, 0);
   // }
 
   if (window->use_custom_frame_.GetValue()) {
@@ skipping 264 matching lines @@
 void BrowserWindowGtk::ShowNewProfileDialog() {
   NOTIMPLEMENTED();
 }
 
 void BrowserWindowGtk::ShowHTMLDialog(HtmlDialogUIDelegate* delegate,
                                       gfx::NativeWindow parent_window) {
   NOTIMPLEMENTED();
 }
 
 void BrowserWindowGtk::UserChangedTheme() {
-  NOTIMPLEMENTED();
+  gdk_window_invalidate_rect(GTK_WIDGET(window_)->window,
+      &GTK_WIDGET(window_)->allocation, TRUE);
 }
 
 int BrowserWindowGtk::GetExtraRenderViewHeight() const {
   int sum = infobar_container_->TotalHeightOfClosingBars();
   if (bookmark_bar_->IsClosing())
     sum += bookmark_bar_->GetHeight();
   if (download_shelf_.get() && download_shelf_->IsClosing()) {
     sum += download_shelf_->GetHeight();
   }
   return sum;
@@ skipping 609 matching lines @@
       *edge = GDK_WINDOW_EDGE_NORTH_EAST;
     } else if (y < bounds_.height() - kResizeAreaCornerSize) {
       *edge = GDK_WINDOW_EDGE_EAST;
     } else {
       *edge = GDK_WINDOW_EDGE_SOUTH_EAST;
     }
     return true;
   }
   NOTREACHED();
 }