[Files.app] Split the JavaScript files into subdirectories: common, background, and foreground

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

-// 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.
-
-/**
- * @fileoverview Utility methods for accessing chrome.metricsPrivate API.
- *
- * To be included as a first script in main.html
- */
-
-var metrics = {};
-
-/**
- * A map from interval name to interval start timestamp.
- */
-metrics.intervals = {};
-
-/**
- * Start the named time interval.
- * Should be followed by a call to recordInterval with the same name.
- *
- * @param {string} name Unique interval name.
- */
-metrics.startInterval = function(name) {
-  metrics.intervals[name] = Date.now();
-};
-
-metrics.startInterval('Load.Total');
-metrics.startInterval('Load.Script');
-
-/**
- * Convert a short metric name to the full format.
- *
- * @param {string} name Short metric name.
- * @return {string} Full metric name.
- * @private
- */
-metrics.convertName_ = function(name) {
-  return 'FileBrowser.' + name;
-};
-
-/**
- * Wrapper method for calling chrome.fileBrowserPrivate safely.
- * @param {string} name Method name.
- * @param {Array.<Object>} args Arguments.
- * @private
- */
-metrics.call_ = function(name, args) {
-  try {
-    chrome.metricsPrivate[name].apply(chrome.metricsPrivate, args);
-  } catch (e) {
-    console.error(e.stack);
-  }
-};
-
-/**
- * Create a decorator function that calls a chrome.metricsPrivate function
- * with the same name and correct parameters.
- *
- * @param {string} name Method name.
- */
-metrics.decorate = function(name) {
-  metrics[name] = function() {
-    var args = Array.apply(null, arguments);
-    args[0] = metrics.convertName_(args[0]);
-    metrics.call_(name, args);
-    if (metrics.log) {
-      console.log('chrome.metricsPrivate.' + name, args);
-    }
-  };
-};
-
-metrics.decorate('recordMediumCount');
-metrics.decorate('recordSmallCount');
-metrics.decorate('recordTime');
-metrics.decorate('recordUserAction');
-
-/**
- * Complete the time interval recording.
- *
- * Should be preceded by a call to startInterval with the same name. *
- *
- * @param {string} name Unique interval name.
- */
-metrics.recordInterval = function(name) {
-  if (name in metrics.intervals) {
-    metrics.recordTime(name, Date.now() - metrics.intervals[name]);
-  } else {
-    console.error('Unknown interval: ' + name);
-  }
-};
-
-/**
- * Record an enum value.
- *
- * @param {string} name Metric name.
- * @param {Object} value Enum value.
- * @param {Array.<Object>|number} validValues Array of valid values
- *                                            or a boundary number value.
- */
-metrics.recordEnum = function(name, value, validValues) {
-  var boundaryValue;
-  var index;
-  if (validValues.constructor.name == 'Array') {
-    index = validValues.indexOf(value);
-    boundaryValue = validValues.length;
-  } else {
-    index = value;
-    boundaryValue = validValues;
-  }
-  // Collect invalid values in the overflow bucket at the end.
-  if (index < 0 || index > boundaryValue)
-    index = boundaryValue;
-
-  // Setting min to 1 looks strange but this is exactly the recommended way
-  // of using histograms for enum-like types. Bucket #0 works as a regular
-  // bucket AND the underflow bucket.
-  // (Source: UMA_HISTOGRAM_ENUMERATION definition in base/metrics/histogram.h)
-  var metricDescr = {
-    'metricName': metrics.convertName_(name),
-    'type': 'histogram-linear',
-    'min': 1,
-    'max': boundaryValue,
-    'buckets': boundaryValue + 1
-  };
-  metrics.call_('recordValue', [metricDescr, index]);
-  if (metrics.log) {
-    console.log('chrome.metricsPrivate.recordValue',
-        [metricDescr.metricName, index, value]);
-  }
-};