[MD History] Add search for synced devices.

chrome/browser/resources/md_history/synced_device_card.js

Index: chrome/browser/resources/md_history/synced_device_card.js
diff --git a/chrome/browser/resources/md_history/synced_device_card.js b/chrome/browser/resources/md_history/synced_device_card.js
index 4b01791c3551e8b0f16a840a60dd3ba4272f559b..d21a7d71d18bfc0dfaf6ce5e377ee0e8dd209963 100644
--- a/chrome/browser/resources/md_history/synced_device_card.js
+++ b/chrome/browser/resources/md_history/synced_device_card.js
@@ -28,6 +28,12 @@ Polymer({
       observer: 'updateIcons_'
     },
 
+    /**
+     * The indexes where a window separator should be shown.

[tsergeant, 2016/06/02 07:12:53]

Nit: It would be nice to try and explain why this method is used, since it's a
little unintuitive and subtle.

[calamity, 2016/06/02 08:20:44]

Done.

For those wondering, this was done to remove the old method of window separator
insertion which relied on modifying the sessionList elements. This would require
resetting and notifying each item. ensuring stale values are handled correctly.
Binding this array to the computed function provides a simpler notification
model since we don't have any stale value problems and are guaranteed to just
recompute everything when this array changes.

+     * @type {!Array<number>}
+     */
+    separatorIndexes: Array,
+
     // Whether the card is open.
     cardOpen_: {
       type: Boolean,
@@ -68,5 +74,9 @@ Polymer({
             cr.icon.getFaviconImageSet(this.tabs[i].url);
       }
     });
+  },
+
+  isWindowSeparatorIndex: function(index, separatorIndexes) {

[tsergeant, 2016/06/02 07:12:53]

Nit: Make this a private function.

[calamity, 2016/06/02 08:20:44]

Done.

+    return this.separatorIndexes.indexOf(index) != -1;
   }
 });