Hook up import history to media scanner.

ui/file_manager/file_manager/foreground/js/metrics_base.js

Index: ui/file_manager/file_manager/foreground/js/metrics_base.js
diff --git a/ui/file_manager/file_manager/foreground/js/metrics_base.js b/ui/file_manager/file_manager/foreground/js/metrics_base.js
index 0aa935552f8261222a2488172ebf2c1eb761ee47..e6ec12377f5dbb7e1a0c407e5d8c87822e523675 100644
--- a/ui/file_manager/file_manager/foreground/js/metrics_base.js
+++ b/ui/file_manager/file_manager/foreground/js/metrics_base.js
@@ -101,6 +101,16 @@ metricsBase.recordUserAction = function(name) {
 };
 
 /**
+ * Records an elapsed time of no more than 10 seconds.
+ * @param {string} name Short metric name.
+ * @param {number} value Numeric value to be recorded in units
+ *     that match the histogram definition (in histograms.xml).
+ */
+metricsBase.recordValue = function(name, value) {
+  metrics.call_('recordValue', [metrics.convertName_(name), value]);
+};
+
+/**
  * Complete the time interval recording.
  *
  * Should be preceded by a call to startInterval with the same name. *