LocationBarView: Add a CHECK to help debug a crash.

chrome/browser/ui/views/location_bar/location_bar_view.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/ui/views/location_bar/location_bar_view.h"
 
 #if defined(TOOLKIT_USES_GTK)
 #include <gtk/gtk.h>
 #endif
 
@@ skipping 453 matching lines @@
 
 gfx::Size LocationBarView::GetPreferredSize() {
   return gfx::Size(0, GetThemeProvider()->GetBitmapNamed(mode_ == POPUP ?
       IDR_LOCATIONBG_POPUPMODE_CENTER : IDR_LOCATIONBG_C)->height());
 }
 
 void LocationBarView::Layout() {
   if (!location_entry_.get())
     return;
 
+  // TODO(jhawkins): Remove once crbug.com/101994 is fixed.
+  CHECK(location_icon_view_);
+
   // TODO(sky): baseline layout.
   int location_y = kVerticalEdgeThickness;
   // In some cases (e.g. fullscreen mode) we may have 0 height.  We still want
   // to position our child views in this case, because other things may be
   // positioned relative to them (e.g. the "bookmark added" bubble if the user
   // hits ctrl-d).
   int location_height = std::max(height() - (kVerticalEdgeThickness * 2), 0);
 
   // The edge stroke is 1 px thick.  In popup mode, the edges are drawn by the
   // omnibox' parent, so there isn't any edge to account for at all.
@@ skipping 789 matching lines @@
       !suggested_text_view_->GetText().empty();
 }
 
 #if !defined(USE_AURA)
 OmniboxViewWin* LocationBarView::GetOmniboxViewWin() {
   CHECK(!views::Widget::IsPureViews());
   return static_cast<OmniboxViewWin*>(location_entry_.get());
 }
 #endif
 #endif