Files.app: Switch analytics to use the chrome version, not the app version, for tracking.

ui/file_manager/file_manager/common/js/metrics.js

Index: ui/file_manager/file_manager/common/js/metrics.js
diff --git a/ui/file_manager/file_manager/common/js/metrics.js b/ui/file_manager/file_manager/common/js/metrics.js
index fa84d7e56d1b711808b45bbd26406574e5a16d06..7fcfc96f7145104c8bcecb9c26cfacb71b7431e5 100644
--- a/ui/file_manager/file_manager/common/js/metrics.js
+++ b/ui/file_manager/file_manager/common/js/metrics.js
@@ -50,7 +50,12 @@ metrics.getTracker = function() {
  * @private
  */
 metrics.createTracker_ = function() {
-  metrics.analytics_ = analytics.getService('Files app');
+  var chromeVersion = /Chrome\/([0-9]*)\.[0-9.]*/.exec(navigator.userAgent);
+  if (chromeVersion && chromeVersion[1]) {
+    metrics.analytics_ = analytics.getService('Files app', chromeVersion[1]);

[mtomasz, 2015/03/25 00:46:16]

optional: This holds milestone only. Shall we keep the entire version string, so
we eg. can see that errors happen since some specific dev/canary release?

+  } else {
+    metrics.analytics_ = analytics.getService('Files app', '0.0');
+  }
 
   // Create a tracker, add a filter that only enables analytics when UMA is
   // enabled.