[MD History] Add URL parameter for search.

chrome/test/data/webui/md_history/md_history_browsertest.js

Index: chrome/test/data/webui/md_history/md_history_browsertest.js
diff --git a/chrome/test/data/webui/md_history/md_history_browsertest.js b/chrome/test/data/webui/md_history/md_history_browsertest.js
index 6de0d2a1b4936d21bdb2bdb307d7945a97f488e9..0ae71fe1985eb32954548e57b471ab539e504f00 100644
--- a/chrome/test/data/webui/md_history/md_history_browsertest.js
+++ b/chrome/test/data/webui/md_history/md_history_browsertest.js
@@ -109,3 +109,46 @@ TEST_F('MaterialHistoryDeletionDisabledTest', 'HistorySupervisedUserTest',
   md_history.history_supervised_user_test.registerTests();
   mocha.run();
 });
+
+function MaterialHistoryWithQueryParamTest() {}
+
+MaterialHistoryWithQueryParamTest.prototype = {
+  __proto__: MaterialHistoryBrowserTest.prototype,
+
+  browsePreload: 'chrome://history?q=query',
+
+  /** @override */
+  setUp: function() {
+    PolymerTest.prototype.setUp.call(this);
+
+    suiteSetup(function() {
+      var upgraded = false;
+
+      // This message handler needs to be registered before the test since the
+      // query can happen immediately after the element is upgraded. However,
+      // since there may be a delay as well, the test might check the global var
+      // too early as well. In this case we send a message to the test to keep
+      // things going.

[tsergeant, 2016/07/19 03:32:20]

oh BOY

I -think- you can simplify this a bit by having the test take over this listener
when it is ready.

Here, do:

registerMessageCallback('queryHistory', this, function (info) {
  window.historyQueryInfo = info;
});

In the test, do:

if (window.historyQueryInfo) {
  verifyFunction(window.historyQueryInfo);
  return;
}

registerMessageCallback('queryHistory', this, verifyFunction);


I'm not 100% certain this will work, but it seems okay. If it doesn't, I would
suggest using a regular callback (window.historyQueriedCallback) instead of
`chrome.send('historyQueried')`, since chrome.send has a specific purpose
already.

[calamity, 2016/07/19 04:35:33]

That does seem to work! I tested by strategically setting timeouts to test the
different cases, seems fine.

+      registerMessageCallback('queryHistory', this, function (info) {
+        console.log(info);

[tsergeant, 2016/07/19 03:32:20]

Delete this log

[calamity, 2016/07/19 04:35:33]

Done.

+        if (upgraded) {
+          chrome.send('historyQueried', info);
+          return;
+        }
+
+        window.historyQueryInfo = info;
+      });
+
+      // Wait for the top-level app element to be upgraded.
+      return waitForUpgrade($('history-app')).then(function() {
+        upgraded = true;
+      });
+    });
+  },
+};
+
+TEST_F('MaterialHistoryWithQueryParamTest', 'RoutingTestWithQueryParam',
+  function() {
+    md_history.history_routing_test_with_query_param.registerTests();
+    mocha.run();
+});