WebUI iron-list: fix chromium.patch

Bug: 899113
Change-Id: Idc90d221cdfbdb11e042b88985ef9394fad20409
Reviewed-on: https://chromium-review.googlesource.com/c/1330335
Commit-Queue: Rebekah Potter <rbpotter@chromium.org>
Reviewed-by: Demetrios Papadopoulos <dpapad@chromium.org>
Cr-Commit-Position: refs/heads/master@{#607810}

third_party/polymer/v1_0/chromium.patch

@@ -27,7 +27,8 @@ index 43c59653a39b..26652936735c 100644
 +        value: false
        }
      },
-@@ -786,6 +794,39 @@
+
+@@ -786,11 +794,53 @@
        newGrid && this._updateGridMetrics();
      },
 
@@ -64,7 +65,8 @@ index 43c59653a39b..26652936735c 100644
 +      return focusWithin ? doSearch(focusWithin, ':focus') : null;
 +    },
 +
-@@ -791,6 +836,15 @@
+     /**
+      * Called when the items have changed. That is, reassignments
       * to `items`, splices or updates to a single item.
       */
      _itemsChanged: function(change) {
@@ -72,7 +74,7 @@ index 43c59653a39b..26652936735c 100644
 +      var lastFocusedIndex, focusedElement;
 +      if (rendering && this.preserveFocus) {
 +        lastFocusedIndex = this._focusedVirtualIndex;
-+        focusedElement = this.querySelector('* /deep/ *:focus');
++        focusedElement = this._getFocusedElement();
 +      }
 +
 +      var preservingFocus = rendering && this.preserveFocus && focusedElement;
@@ -80,7 +82,7 @@ index 43c59653a39b..26652936735c 100644
        if (change.path === 'items') {
          this._virtualStart = 0;
          this._physicalTop = 0;
-@@ -804,7 +858,7 @@
+@@ -804,7 +854,7 @@
          this._physicalItems = this._physicalItems || [];
          this._physicalSizes = this._physicalSizes || [];
          this._physicalStart = 0;
@@ -89,7 +91,7 @@ index 43c59653a39b..26652936735c 100644
            this._resetScrollPosition(0);
          }
          this._removeFocusedItem();
-@@ -826,6 +880,17 @@
+@@ -834,6 +884,17 @@
        } else if (change.path !== 'items.length') {
          this._forwardItemPath(change.path, change.value);
        }