Files.app: Move the error handler to the top of combined script.

Currently the error handler to count uncaught errors is set in the file_manager.js.
This CL moved the error handler to the top of combined script, which enable us to catch the uncaught erros that is raised before the file_manager.js is loaded.

BUG=none
TEST=manually

Review URL: https://chromiumcodereview.appspot.com/23536047

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@223603 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/resources/file_manager/js/error_counter.js

+// Copyright 2013 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.
+
+'use strict';
+
+/**
+ * This variable is checked in SelectFileDialogExtensionBrowserTest.
+ * @type {number}
+ */
+window.JSErrorCount = 0;
+
+/**
+ * Count uncaught exceptions.
+ */
+window.onerror = function() { window.JSErrorCount++; };

chrome/browser/resources/file_manager/js/file_manager.js

@@ -4,17 +4,6 @@
 
 'use strict';
 
-/**
- * This variable is checked in SelectFileDialogExtensionBrowserTest.
- * @type {number}
- */
-window.JSErrorCount = 0;
-
-/**
- * Count uncaught exceptions.
- */
-window.onerror = function() { window.JSErrorCount++; };
-
 /**
  * FileManager constructor.
  *

chrome/browser/resources/file_manager/js/main_scripts.js

@@ -66,6 +66,9 @@
 (function() {
 // 'strict mode' is invoked for this scope.
 
+// // This script must be loaded before all other Files.app's scripts.
+//<include src="error_counter.js"/>
+//
 //<include src="combobutton.js"/>
 //<include src="commandbutton.js"/>
 //<include src="ui/file_manager_dialog_base.js"/>

chrome/browser/resources/file_manager/main.html

@@ -79,6 +79,9 @@
       <script src="chrome://resources/js/cr/ui/menu_button.js"></script>
       <script src="chrome://resources/js/cr/ui/context_menu_handler.js"></script>
 
+      <!-- This script must be loaded before all other Files.app's scripts. -->
+      <script src="js/error_counter.js"></script>
+
       <script src="js/combobutton.js"></script>
       <script src="js/commandbutton.js"></script>
       <script src="js/ui/file_manager_dialog_base.js"></script>