Include a machine id in log files.

ui/file_manager/file_manager/common/js/importer_common_unittest.js

Index: ui/file_manager/file_manager/common/js/importer_common_unittest.js
diff --git a/ui/file_manager/file_manager/common/js/importer_common_unittest.js b/ui/file_manager/file_manager/common/js/importer_common_unittest.js
index d61067d28997de8d947342ec896464a07e11e1bb..33a8f80268a5c1bc2f42bfce70f7b6a69abafae5 100644
--- a/ui/file_manager/file_manager/common/js/importer_common_unittest.js
+++ b/ui/file_manager/file_manager/common/js/importer_common_unittest.js
@@ -23,13 +23,14 @@ var sdFileEntry;
 /** @type {!MockFileEntry} */
 var driveFileEntry;
 
+// Sadly, boilerplate setup necessary to include test support classes.
+loadTimeData.data = {
+  DRIVE_DIRECTORY_LABEL: 'My Drive',
+  DOWNLOADS_DIRECTORY_LABEL: 'Downloads'
+};
+
 // Set up the test components.
 function setUp() {
-  // Sadly, boilerplate setup necessary to include test support classes.
-  loadTimeData.data = {
-    DRIVE_DIRECTORY_LABEL: 'My Drive',
-    DOWNLOADS_DIRECTORY_LABEL: 'Downloads'
-  };
   var cameraFileSystem = new MockFileSystem(
       'camera-fs', 'filesystem:camera-123');
   var sdFileSystem = new MockFileSystem(
@@ -103,6 +104,35 @@ function testResolver_Reject(callback) {
           });
 }
 
+function testGetMachineId(callback) {
+  var storage = new MockChromeStorageAPI();
+
+  var promise = importer.getMachineId().then(
+      function(firstMachineId) {
+        assertTrue(100000 <= firstMachineId <= 9999999);
+        importer.getMachineId().then(
+            function(secondMachineId) {
+              assertEquals(firstMachineId, secondMachineId);
+            });
+      });
+  reportPromise(promise, callback);
+}
+
+function testHistoryFilename(callback) {
+  var storage = new MockChromeStorageAPI();
+
+  var promise = importer.getHistoryFilename().then(
+      function(firstName) {
+        assertTrue(!!firstName && firstName.length > 10);
+        importer.getHistoryFilename().then(
+            function(secondName) {
+              assertEquals(firstName, secondName);
+            });
+      });
+
+  reportPromise(promise, callback);
+}
+
 /** @param {string} path */
 function assertIsMediaDir(path) {
   var dir = createDirectoryEntry(sdVolume, path);