Only show summary panel for progress panels.

Logic for deleting a summary panel was checking the total number
of panels active, rather than the number of 'progress' panels.

Use the count of progress panels as the criteria for removal of
the summary panel display.

Bug: 987931
Change-Id: I0ac1aa47fbcd297b916a1047b945c6682ee9884f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1732589Reviewed-by: Noel Gordon <noel@chromium.org>
Commit-Queue: Alex Danilo <adanilo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#683936}

ui/file_manager/file_manager/foreground/elements/xf_display_panel.js

@@ -85,10 +85,7 @@ class DisplayPanel extends HTMLElement {
               /* Limit to 3 visible progress panels before scroll. */
               #panels {
                   max-height: calc(192px + 28px);
-              }
-              /* Show only the first of any non-progress panels. */
-              xf-panel-item:not([panel-type='0']):not(:first-child) {
-                display: none;
+                  overflow-y: auto;
               }
               xf-panel-item:not(:only-child) {
                 --progress-height: 64px;
@@ -239,8 +236,15 @@ class DisplayPanel extends HTMLElement {
     let summaryHost = this.shadowRoot.querySelector('#summary');
     let summaryPanel = summaryHost.querySelector('#summary-panel');
 
-    // If there's only one panel item active, no need for summary.
-    if (this.items_.length <= 1 && summaryPanel) {
+    // Work out how many progress panels are being shown.
+    let count = 0;
+    for (let i = 0; i < this.items_.length; ++i) {
+      if (this.items_[i].panelType == this.items_[i].panelTypeProgress) {
+        count++;
+      }
+    }
+    // If there's only one progress panel item active, no need for summary.
+    if (count <= 1 && summaryPanel) {
       const button = summaryPanel.primaryButton;
       if (button) {
         button.removeEventListener('click', this.toggleSummary);
@@ -252,12 +256,6 @@ class DisplayPanel extends HTMLElement {
       return;
     }
     // Show summary panel if there are more than 1 progress panels.
-    let count = 0;
-    for (let i = 0; i < this.items_.length; ++i) {
-      if (this.items_[i].panelType == this.items_[i].panelTypeProgress) {
-        count++;
-      }
-    }
     if (count > 1 && !summaryPanel) {
       summaryPanel = document.createElement('xf-panel-item');
       summaryPanel.setAttribute('panel-type', 1);