First cut at UI for saving net_logs data into a temporary file on

chrome/browser/resources/net_export/net_export.js

+// Copyright (c) 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.
+
+/**
+ * Object to communicate between the renderer and the browser.
+ * @type {!BrowserBridge}
+ */
+var g_exportBrowserBridge = null;
+
+/**
+ * Main entry point called once the page has loaded.
+ */
+function onLoad() {
+  g_exportBrowserBridge = new BrowserBridge();
+  MainView.getInstance();
+}
+
+document.addEventListener('DOMContentLoaded', onLoad);
+
+
+/**
+ * This class provides a "bridge" for communicating between the javascript and
+ * the browser.
+ */
+var BrowserBridge = (function() {
+  'use strict';
+
+  /**
+   * @constructor
+   */
+  function BrowserBridge() {
+  }
+
+  BrowserBridge.prototype = {
+
+    //--------------------------------------------------------------------------
+    // Messages received from the browser.
+    //--------------------------------------------------------------------------
+
+    receivedData: function(data) {

[James Hawkins, 2013/01/31 18:58:46]

Same thing: why do you need a 'bridge'?

[ramant (doing other things), 2013/01/31 19:58:26]

Called the JS function directly from C++ code.

Done.

+      MainView.getInstance().onExportNetLogInfoChanged(data);
+    }
+  };
+
+  return BrowserBridge;
+})();
+
+/**
+ * This class handles the presentation of our profiler view. Used as a
+ * singleton.
+ */
+var MainView = (function() {
+  'use strict';
+
+  /**
+   * Delay in milliseconds between updates of certain browser information.
+   */
+  var POLL_INTERVAL_MS = 5000;
+
+  // --------------------------------------------------------------------------
+  // Important IDs in the HTML document
+  // --------------------------------------------------------------------------
+
+  var START_DATA_BUTTON_ID = 'export-view-start-data';

[James Hawkins, 2013/01/31 18:58:46]

/** @const */

[ramant (doing other things), 2013/01/31 19:58:26]

Done.

+  var STOP_DATA_BUTTON_ID = 'export-view-stop-data';
+  var SEND_DATA_BUTTON_ID = 'export-view-send-data';
+  var FILE_PATH_TEXT_ID = 'export-view-file-path-text';
+
+  // --------------------------------------------------------------------------
+
+  /**
+   * @constructor
+   */
+  function MainView() {
+    $(START_DATA_BUTTON_ID).onclick = this.onStartData_.bind(this);
+    $(STOP_DATA_BUTTON_ID).onclick = this.onStopData_.bind(this);
+    $(SEND_DATA_BUTTON_ID).onclick = this.onSendData_.bind(this);
+
+    window.setInterval(function() { chrome.send('getExportNetLogInfo'); },
+                       POLL_INTERVAL_MS);
+
+    chrome.send('getExportNetLogInfo');
+  }
+
+  cr.addSingletonGetter(MainView);
+
+  MainView.prototype = {
+    /**
+     * Starts saving NetLog data to a file.
+     */
+    onStartData_: function() {
+      chrome.send('startNetLog');
+    },
+
+    /**
+     * Stops saving NetLog data to a file.
+     */
+    onStopData_: function() {
+      chrome.send('stopNetLog');
+    },
+
+    /**
+     * Sends NetLog data via email from browser.
+     */
+    onSendData_: function() {
+      chrome.send('sendNetLog');
+    },
+
+    onExportNetLogInfoChanged: function(exportNetLogInfo) {

[James Hawkins, 2013/01/31 18:58:46]

nit: Document method.

[ramant (doing other things), 2013/01/31 19:58:26]

Done.

+      if (exportNetLogInfo.file) {
+        var message = '';
+        if (exportNetLogInfo.state == 'ALLOW_STOP')
+          message = 'NetLog data is collected in: ';
+        else if (exportNetLogInfo.state == 'ALLOW_START_SEND')
+          message = 'NetLog data to send is in: ';
+        $(FILE_PATH_TEXT_ID).textContent = message + exportNetLogInfo.file;
+      } else {
+        $(FILE_PATH_TEXT_ID).textContent = '';
+      }
+
+      $(START_DATA_BUTTON_ID).disabled = true;
+      $(STOP_DATA_BUTTON_ID).disabled = true;
+      $(SEND_DATA_BUTTON_ID).disabled = true;
+      if (exportNetLogInfo.state == 'ALLOW_START') {
+        $(START_DATA_BUTTON_ID).disabled = false;
+      } else if (exportNetLogInfo.state == 'ALLOW_STOP') {
+        $(STOP_DATA_BUTTON_ID).disabled = false;
+      } else if (exportNetLogInfo.state == 'ALLOW_START_SEND') {
+        $(START_DATA_BUTTON_ID).disabled = false;
+        $(SEND_DATA_BUTTON_ID).disabled = false;
+      } else if (exportNetLogInfo.state == 'UNINITIALIZED') {
+        $(FILE_PATH_TEXT_ID).textContent =
+            'Unable to initialize NetLog data file.';
+      }
+    }
+  };
+
+  return MainView;
+})();