Created a test for window.location.reload().

ios/web/navigation/window_location_inttest.mm

Index: ios/web/navigation/window_location_inttest.mm
diff --git a/ios/web/navigation/window_location_inttest.mm b/ios/web/navigation/window_location_inttest.mm
index 3da12faab80a7ca48ea1ee9960e95c7c27417c40..0dee49093045da8bb83921ac4a28796d888a9023 100644
--- a/ios/web/navigation/window_location_inttest.mm
+++ b/ios/web/navigation/window_location_inttest.mm
@@ -41,6 +41,7 @@
 // Button IDs used in the window.location test page.
 const char kWindowLocationAssignID[] = "location-assign";
 const char kWindowLocationReplaceID[] = "location-replace";
+const char kWindowLocationReloadID[] = "location-reload";
 
 // JavaScript functions on the window.location test page.
 const char kUpdateURLScriptFormat[] = "updateUrlToLoadText('%s')";
@@ -285,3 +286,17 @@ NSInteger GetIndexOfNavigationItem(const web::NavigationItem* item) {
   EXPECT_EQ(about_blank,
             navigation_manager()->GetLastCommittedItem()->GetURL());
 }
+
+// Tests that calling window.location.reload() causes an onload event to occur.
+TEST_F(WindowLocationTest, WindowLocationReload) {
+  // Tap the window.location.reload() button.
+  ExpectPageLoad(window_location_url());
+  ASSERT_TRUE(
+      web::test::TapWebViewElementWithId(web_state(), kWindowLocationReloadID));
+  WaitForPageToLoad();
+
+  // Verify that |kOnLoadText| is displayed and that no additional
+  // NavigationItems are added.
+  EXPECT_TRUE(IsOnLoadTextVisible());
+  EXPECT_EQ(1, (NSInteger)navigation_manager()->GetItemCount());

[Eugene But (OOO till 7-30), 2016/12/23 01:57:34]

Please don't use C-style casting, also this would probably work for you:
EXPECT_EQ(1U, navigation_manager()->GetItemCount());

[kkhorimoto, 2017/01/20 00:38:20]

Done.

+}