Fix build breakage.

chrome/browser/ui/webui/task_manager_handler.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/webui/task_manager_handler.h"
 
 #include <algorithm>
 #include <functional>
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 384 matching lines @@
   } else {
     DCHECK(false);
   }
 
   task_manager_->OpenAboutMemory();
 }
 
 // TaskManagerHandler, private: -----------------------------------------------
 
 bool TaskManagerHandler::is_alive() {
-  return web_ui_->tab_contents()->render_view_host();
+  return web_ui_->tab_contents()->render_view_host() != 0;
 }
 
 void TaskManagerHandler::UpdateResourceGroupTable(int start, int length) {
   if (resource_to_group_table_.size() < static_cast<size_t>(start)) {
     length += start - resource_to_group_table_.size();
     start = resource_to_group_table_.size();
   }
 
   // Makes room to fill group_index at first since inserting vector is too slow.
   std::vector<int>::iterator it = resource_to_group_table_.begin() + start;
@@ skipping 34 matching lines @@
   }
 }
 
 void TaskManagerHandler::OnGroupRemoved(const int group_start,
                                         const int group_length) {
   base::FundamentalValue start_value(group_start);
   base::FundamentalValue length_value(group_length);
   if (is_enabled_ && is_alive())
     web_ui_->CallJavascriptFunction("taskRemoved", start_value, length_value);
 }