[Android] Fix crash when closing tab during infobar cancellation

chrome/android/javatests/src/org/chromium/chrome/browser/download/DownloadTest.java

Index: chrome/android/javatests/src/org/chromium/chrome/browser/download/DownloadTest.java
diff --git a/chrome/android/javatests/src/org/chromium/chrome/browser/download/DownloadTest.java b/chrome/android/javatests/src/org/chromium/chrome/browser/download/DownloadTest.java
index 15496a076e6554f04497629239f384002d70b207..8c16fb543ac1b71c49c74391ee8f94fb8ef45c94 100644
--- a/chrome/android/javatests/src/org/chromium/chrome/browser/download/DownloadTest.java
+++ b/chrome/android/javatests/src/org/chromium/chrome/browser/download/DownloadTest.java
@@ -93,6 +93,35 @@ public class DownloadTest extends DownloadTestBase {
 
     @MediumTest
     @Feature({"Downloads"})
+    public void testDangerousDownloadCancel() throws Exception {
+        loadUrl(mTestServer.getURL("/chrome/test/data/android/download/dangerous.html"));
+        waitForFocus();
+        View currentView = getActivity().getActivityTab().getView();
+        TouchCommon.longPressView(currentView);
+
+        // Open in new tab so that the "CloseBlankTab" functionality is invoked later.
+        getInstrumentation().invokeContextMenuAction(getActivity(),
+                R.id.contextmenu_open_in_new_tab, 0);
+
+        waitForNewTabToStabilize(2);
+        goToLastTab();
+        assertPollForInfoBarSize(1);
+
+        assertTrue("Cancel button wasn't found",
+                InfoBarUtil.clickSecondaryButton(getInfoBars().get(0)));
+
+        // "Cancel" should close the blank tab opened for this download.
+        CriteriaHelper.pollUiThread(
+                Criteria.equals(1, new Callable<Integer>() {
+                    @Override
+                    public Integer call() {
+                        return getActivity().getCurrentTabModel().getCount();
+                    }
+                }));
+    }
+
+    @MediumTest
+    @Feature({"Downloads"})
     public void testHttpPostDownload() throws Exception {
         loadUrl(mTestServer.getURL("/chrome/test/data/android/download/post.html"));
         waitForFocus();