[File SWA]: Enabling metricsPrivate; removing fakes

Adding chrome://file-manager/* as one of the URLs allowed to use metics
private. This allows us to remove faked out metrics private from
file_manager_fakes.js

Bug: 1113981
Change-Id: Ica90a7fe5560474bde91bbd911782d5cdca57211
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2586417
Commit-Queue: Bo Majewski <majewski@chromium.org>
Reviewed-by: Luciano Pacheco <lucmult@chromium.org>
Reviewed-by: Ben Wells <benwells@chromium.org>
Cr-Commit-Position: refs/heads/master@{#836528}

chromeos/components/file_manager/resources/file_manager_fakes.js

@@ -76,67 +76,6 @@ window.chrome.storage = {
   },
 };
 
-/** @suppress {checkTypes} */
-window.chrome.metricsPrivate = {
-  /** @enum {string} */
-  MetricTypeType: {
-    HISTOGRAM_LINEAR: 'histogram-linear',
-  },
-
-  /**
-   * Describes the type of metric to be collected.
-   * @typedef {{
-   *   metricName: string,
-   *   type: !chrome.metricsPrivate.MetricTypeType,
-   *   min: number,
-   *   max: number,
-   *   buckets: number
-   * }}
-   */
-  MetricType: {},
-
-  /**
-   * Records a value than can range from 1 to 100.
-   * @param {string} metricName
-   * @param {number} value
-   */
-  recordSmallCount: (metricName, value) => {},
-
-  /**
-   * Records a value than can range from 1 to 10,000.
-   * @param {string} metricName
-   * @param {number} value
-   */
-  recordMediumCount: (metricName, value) => {},
-
-  /**
-   * Records a percentage value from 1 to 100.
-   * @param {string} metricName
-   * @param {number} value
-   */
-  recordPercentage: (metricName, value) => {},
-
-  /**
-   * Records an elapsed time of no more than 10 seconds.
-   * @param {string} metricName
-   * @param {number} value Value in milliseconds.
-   */
-  recordTime: (metricName, value) => {},
-
-  /**
-   * Records an action performed by the user.
-   * @param {string} name
-   */
-  recordUserAction: (name) => {},
-
-  /**
-   * Adds a value to the given metric.
-   * @param {!chrome.metricsPrivate.MetricType} metric
-   * @param {number} value
-   */
-  recordValue: (metricName, value) => {},
-};
-
 window.BackgroundWindowSWA = class {
   constructor() {
     /**

extensions/common/api/_api_features.json

@@ -312,7 +312,8 @@
       "chrome://tab-search/*",
       "chrome://tab-strip/*",
       "chrome://welcome/*",
-      "chrome://profile-picker/*"
+      "chrome://profile-picker/*",
+      "chrome://file-manager/*"
     ]
   }, {
     "channel": "stable",