[pinpoint] Fix incorrect and missing icons on the chart.

dashboard/dashboard/pinpoint/elements/job-page-chart.html

Index: dashboard/dashboard/pinpoint/elements/job-page-chart.html
diff --git a/dashboard/dashboard/pinpoint/elements/job-page-chart.html b/dashboard/dashboard/pinpoint/elements/job-page-chart.html
index b2f98b856dd9b8c7e2e6b15a1408d1addde9927e..d1bb3c62b06343ef9297d3d9679722acb1499b3c 100644
--- a/dashboard/dashboard/pinpoint/elements/job-page-chart.html
+++ b/dashboard/dashboard/pinpoint/elements/job-page-chart.html
@@ -152,7 +152,7 @@ found in the LICENSE file.
         this.chart = $.plot(this.$.plot, data, options);
 
         // Draw overlays.
-        for (let i = 1; i < valuesByChange.length; ++i) {
+        for (let i = 0; i < valuesByChange.length; ++i) {
           const offset = this.chart.pointOffset({
             x: i,
             y: median(valuesByChange[i]) || (max + min) / 2
@@ -169,7 +169,9 @@ found in the LICENSE file.
             // Draw icons for failed and pending attempts.
             const status = document.createElement('job-page-chart-icon');
             status.setPosition(offset.left, offset.top);
-            if (this.jobInfo.comparisons[i] == 'pending') {
+            // TODO: Plumb through real "pending" information from the Job.
+            if (this.jobInfo.comparisons[i] === 'pending' ||
+                this.jobInfo.comparisons[i - 1] === 'pending') {
               status.setType('pending');
             } else {
               status.setType('failed');