Console log and reporting on invalid comment ranges

Change-Id: Ie1f0172cee1d7b4a2e78d5eb8c60745162f650f1

polygerrit-ui/app/elements/core/gr-reporting/gr-reporting.js

@@ -192,8 +192,8 @@
       delete this._baselines[name];
     },
 
-    reportInteraction: function(eventName) {
+    reportInteraction: function(eventName, opt_msg) {
-      this.reporter(INTERACTION_TYPE, this.category, eventName);
+      this.reporter(INTERACTION_TYPE, this.category, eventName, opt_msg);
     },
   });
 

polygerrit-ui/app/elements/diff/gr-ranged-comment-layer/gr-ranged-comment-layer.html

@@ -15,7 +15,11 @@ limitations under the License.
 -->
 
 <link rel="import" href="../../../bower_components/polymer/polymer.html">
+<link rel="import" href="../../core/gr-reporting/gr-reporting.html">
 <dom-module id="gr-ranged-comment-layer">
+  <template>
+    <gr-reporting id="reporting" category="comments"></gr-reporting>
+  </template>
   <script src="../gr-diff-highlight/gr-annotation.js"></script>
   <script src="gr-ranged-comment-layer.js"></script>
 </dom-module>

polygerrit-ui/app/elements/diff/gr-ranged-comment-layer/gr-ranged-comment-layer.js

@@ -20,6 +20,8 @@
   var RANGE_HIGHLIGHT = 'range';
   var HOVER_HIGHLIGHT = 'rangeHighlight';
 
+  var NORMALIZE_RANGE_EVENT = 'normalize-range';
+
   Polymer({
     is: 'gr-ranged-comment-layer',
 
@@ -181,10 +183,13 @@
             // @see Issue 5744
             if (range.start >= range.end && range.start < line.text.length) {
               range.end = line.text.length;
+              this.$.reporting.reportInteraction(NORMALIZE_RANGE_EVENT,
+                  'Modified invalid comment range on l.' + lineNum +
+                  ' of the ' + side + ' side');
             }
 
             return range;
-          })
+          }.bind(this))
           .sort(function(a, b) {
             // Sort the ranges so that hovering highlights are on top.
             return a.hovering && !b.hovering ? 1 : 0;