exhibit 1: explicit null checks

chrome/browser/task_manager/task_manager_resource_providers.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/task_manager/task_manager_resource_providers.h"
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/bind.h"
@@ skipping 316 matching lines @@
   return l10n_util::GetStringFUTF16(message_id, tab_title);
 }
 
 string16 TaskManagerTabContentsResource::GetProfileName() const {
   return GetProfileNameFromInfoCache(tab_contents_->profile());
 }
 
 gfx::ImageSkia TaskManagerTabContentsResource::GetIcon() const {
   if (IsPrerendering())
     return *prerender_icon_;
-  return tab_contents_->favicon_tab_helper()->GetFavicon().AsImageSkia();
+  const gfx::Image& icon = tab_contents_->favicon_tab_helper()->GetFavicon();
+  return icon.IsEmpty() ? gfx::ImageSkia() : *icon.ToImageSkia();
 }
 
 WebContents* TaskManagerTabContentsResource::GetWebContents() const {
   return tab_contents_->web_contents();
 }
 
 const Extension* TaskManagerTabContentsResource::GetExtension() const {
   if (HostsExtension()) {
     ExtensionService* extension_service =
         tab_contents_->profile()->GetExtensionService();
@@ skipping 1344 matching lines @@
 
   return &resource_;
 }
 
 void TaskManagerBrowserProcessResourceProvider::StartUpdating() {
   task_manager_->AddResource(&resource_);
 }
 
 void TaskManagerBrowserProcessResourceProvider::StopUpdating() {
 }