Automated VR refresh test

Automates the manual test for ensuring that the refresh button in the
VR browser's overflow menu functions as expected.

Bug: 887510
Change-Id: I9e97f5b5c313229e8845ef7fc0f1e2730434bf29
Reviewed-on: https://chromium-review.googlesource.com/c/1333111Reviewed-by: Bill Orr <billorr@chromium.org>
Commit-Queue: Brian Sheedy <bsheedy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#607734}

chrome/android/javatests/src/org/chromium/chrome/browser/vr/VrBrowserControllerInputTest.java

@@ -388,7 +388,7 @@ public class VrBrowserControllerInputTest {
                                           navStart, POLL_TIMEOUT_SHORT_MS))
                            .doubleValue()
                     > navigationTimestamp;
-        });
+        }, "Dragging page down did not refresh page");
     }
 
     /**

chrome/android/javatests/src/org/chromium/chrome/browser/vr/VrBrowserNavigationTest.java

@@ -524,6 +524,34 @@ public class VrBrowserNavigationTest {
                 "Forward button is enabled.", VrBrowserTransitionUtils.isForwardButtonEnabled());
     }
 
+    /**
+     * Tests that the refresh button in the overflow menu properly refreshes the page.
+     */
+    @Test
+    @MediumTest
+    public void testRefreshButton() throws InterruptedException {
+        // The navigationStart time should change anytime we refresh, so save the value and compare
+        // later.
+        // Use a double because apparently returning Unix timestamps as floating point is a logical
+        // thing for JavaScript to do and Long.valueOf is afraid of decimal points.
+        String navStart = "window.performance.timing.navigationStart";
+        final double navigationTimestamp =
+                Double.valueOf(mVrBrowserTestFramework.runJavaScriptOrFail(
+                                       navStart, POLL_TIMEOUT_SHORT_MS))
+                        .doubleValue();
+        NativeUiUtils.clickElementAndWaitForUiQuiescence(
+                UserFriendlyElementName.OVERFLOW_MENU, new PointF());
+        NativeUiUtils.clickElement(UserFriendlyElementName.RELOAD_BUTTON, new PointF());
+
+        // Wait for the navigationStart time to be newer than our saved time.
+        CriteriaHelper.pollInstrumentationThread(() -> {
+            return Double.valueOf(mVrBrowserTestFramework.runJavaScriptOrFail(
+                                          navStart, POLL_TIMEOUT_SHORT_MS))
+                           .doubleValue()
+                    > navigationTimestamp;
+        }, "Refresh button did not refresh page");
+    }
+
     /**
      * Tests that navigation to/from native pages works properly and that interacting with the
      * screen doesn't cause issues. See crbug.com/737167.