Do not load extension system in the Profile import process.

chrome/browser/ui/views/location_bar/location_bar_view.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/views/location_bar/location_bar_view.h"
 
 #include <algorithm>
 #include <map>
 
 #include "base/command_line.h"
@@ skipping 84 matching lines @@
 #include "ui/compositor/scoped_layer_animation_settings.h"
 #endif
 
 using content::WebContents;
 using views::View;
 
 namespace {
 
 Browser* GetBrowserFromDelegate(LocationBarView::Delegate* delegate) {
   WebContents* contents = delegate->GetWebContents();
-  return chrome::FindBrowserWithWebContents(contents);
+  return contents ? chrome::FindBrowserWithWebContents(contents) : NULL;
 }
 
 // Height of the location bar's round corner region.
 const int kBorderRoundCornerHeight = 5;
 // Width of location bar's round corner region.
 const int kBorderRoundCornerWidth = 4;
 // Radius of the round corners inside the location bar.
 const int kBorderCornerRadius = 2;
 
 const int kDesktopItemPadding = 3;
@@ skipping 1157 matching lines @@
     ConvertPointToScreen(this, &screen_point);
     omnibox_win->HandleExternalMsg(msg, flags, screen_point.ToPOINT());
   }
 }
 #endif
 
 void LocationBarView::ShowFirstRunBubbleInternal() {
 #if !defined(OS_CHROMEOS)
   // First run bubble doesn't make sense for Chrome OS.
   Browser* browser = GetBrowserFromDelegate(delegate_);
+  if (!browser)
+    return; // Possible when browser is shutting down.
+
   FirstRunBubble::ShowBubble(browser, location_icon_view_);
 #endif
 }
 
 void LocationBarView::PaintPageActionBackgrounds(gfx::Canvas* canvas) {
   WebContents* web_contents = GetWebContents();
   // web_contents may be NULL while the browser is shutting down.
   if (!web_contents)
     return;
 
@@ skipping 282 matching lines @@
 int LocationBarView::GetInternalHeight(bool use_preferred_size) {
   int total_height =
       use_preferred_size ? GetPreferredSize().height() : height();
   return std::max(total_height - (kVerticalEdgeThickness * 2), 0);
 }
 
 bool LocationBarView::HasValidSuggestText() const {
   return suggested_text_view_ && !suggested_text_view_->size().IsEmpty() &&
       !suggested_text_view_->text().empty();
 }