Make content_shell handle renderers going away. I've made TabContents call TabContentsView::OnTab...

chrome/browser/tab_contents/tab_contents_view_gtk.cc

 // Copyright (c) 2011 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/tab_contents/tab_contents_view_gtk.h"
 
 #include <gdk/gdk.h>
 #include <gdk/gdkkeysyms.h>
 #include <gtk/gtk.h>
 
 #include <algorithm>
 
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
 #include "build/build_config.h"
+#include "chrome/browser/browser_shutdown.h"
 #include "chrome/browser/tab_contents/render_view_context_menu_gtk.h"
 #include "chrome/browser/tab_contents/web_drag_dest_gtk.h"
 #include "chrome/browser/ui/gtk/constrained_window_gtk.h"
 #include "chrome/browser/ui/gtk/gtk_util.h"
 #include "chrome/browser/ui/gtk/sad_tab_gtk.h"
 #include "chrome/browser/ui/gtk/tab_contents_drag_source.h"
 #include "content/browser/renderer_host/render_process_host.h"
 #include "content/browser/renderer_host/render_view_host.h"
 #include "content/browser/renderer_host/render_view_host_factory.h"
 #include "content/browser/renderer_host/render_widget_host_view_gtk.h"
@@ skipping 163 matching lines @@
 void TabContentsViewGtk::SetPageTitle(const string16& title) {
   // Set the window name to include the page title so it's easier to spot
   // when debugging (e.g. via xwininfo -tree).
   gfx::NativeView content_view = GetContentNativeView();
   if (content_view && content_view->window)
     gdk_window_set_title(content_view->window, UTF16ToUTF8(title).c_str());
 }
 
 void TabContentsViewGtk::OnTabCrashed(base::TerminationStatus status,
                                       int error_code) {
+  // Only show the sad tab if we're not in browser shutdown, so that TabContents
+  // objects that are not in a browser (e.g., HTML dialogs) and thus are
+  // visible do not flash a sad tab page.
+  if (browser_shutdown::GetShutdownType() != browser_shutdown::NOT_VALID)
+    return;
+
   if (tab_contents_ != NULL && !sad_tab_.get()) {
     sad_tab_.reset(new SadTabGtk(
         tab_contents_,
         status == base::TERMINATION_STATUS_PROCESS_WAS_KILLED ?
         SadTabGtk::KILLED : SadTabGtk::CRASHED));
     InsertIntoContentArea(sad_tab_->widget());
     gtk_widget_show(sad_tab_->widget());
   }
 }
 
@@ skipping 286 matching lines @@
   g_value_set_int(&value, child_x);
   gtk_container_child_set_property(GTK_CONTAINER(floating_container),
                                    widget, "x", &value);
 
   int child_y = std::max((allocation->height - requisition.height) / 2, 0);
   g_value_set_int(&value, child_y);
   gtk_container_child_set_property(GTK_CONTAINER(floating_container),
                                    widget, "y", &value);
   g_value_unset(&value);
 }