Files.app: Add metrics of RAW file loading time.

ui/file_manager/file_manager/common/js/metrics_events.js

Index: ui/file_manager/file_manager/common/js/metrics_events.js
diff --git a/ui/file_manager/file_manager/common/js/metrics_events.js b/ui/file_manager/file_manager/common/js/metrics_events.js
index a25dc1e9b774593c1f407555dee1116c347e2b59..a4000f7c9bae4fdf1516f1e115a974494cde743f 100644
--- a/ui/file_manager/file_manager/common/js/metrics_events.js
+++ b/ui/file_manager/file_manager/common/js/metrics_events.js
@@ -19,7 +19,8 @@ var metrics = metrics || metricsBase;
 /** @enum {string} */
 metrics.Categories = {
   ACQUISITION: 'Acquisition',
-  INTERNALS: 'Internals'
+  INTERNALS: 'Internals',
+  RAW_IMAGE: 'Raw Image'
 };
 
 /**
@@ -144,5 +145,6 @@ metrics.timing = metrics.timing || {};
 metrics.timing.Variables = {
   COMPUTE_HASH: 'Compute Content Hash',
   SEARCH_BY_HASH: 'Search By Hash',
-  HISTORY_LOAD: 'History Load'
+  HISTORY_LOAD: 'History Load',
+  EXTRACT_JPEG_FROM_RAW: 'Extract JPEG From RAW'

[Steve McKay, 2015/04/14 18:30:11]

I thought we were going to include the source extension name in this...that
would allow us to know if there were some extensions that were slow relative to
others.

If you don't want to do that, then replace "JPEG" with "Thumbnail".

[hirono, 2015/04/15 01:57:10]

The extension is reported as label (the 4th arguments of startTiming).
JPEG -> Thumbnail is done.

 };