JavascriptAppModalDialog tests and necessary infrastructure.

chrome/android/testshell/javatests/src/org/chromium/chrome/testshell/ChromiumTestShellTestBase.java

Index: chrome/android/testshell/javatests/src/org/chromium/chrome/testshell/ChromiumTestShellTestBase.java
diff --git a/chrome/android/testshell/javatests/src/org/chromium/chrome/testshell/ChromiumTestShellTestBase.java b/chrome/android/testshell/javatests/src/org/chromium/chrome/testshell/ChromiumTestShellTestBase.java
index aabfc48151dcd5bc450b903427452a33a2b44701..1c80486c65f20684b46ed90e7538aba55c706b93 100644
--- a/chrome/android/testshell/javatests/src/org/chromium/chrome/testshell/ChromiumTestShellTestBase.java
+++ b/chrome/android/testshell/javatests/src/org/chromium/chrome/testshell/ChromiumTestShellTestBase.java
@@ -57,7 +57,7 @@ public class ChromiumTestShellTestBase extends
      * @return Whether or not the Shell was actually finished loading.
      * @throws Exception
      */
-    protected boolean waitForActiveShellToBeDoneLoading() throws Exception {
+    protected boolean waitForActiveShellToBeDoneLoading() throws InterruptedException {
         final ChromiumTestShellActivity activity = getActivity();
 
         // Wait for the Content Shell to be initialized.
@@ -86,4 +86,18 @@ public class ChromiumTestShellTestBase extends
             }
         }, WAIT_FOR_ACTIVE_SHELL_LOADING_TIMEOUT, CriteriaHelper.DEFAULT_POLLING_INTERVAL);
     }
+
+    /**
+     * Navigates the currently active tab to a sanitized version of {@code url}.
+     * @param url The potentially unsanitized URL to navigate to.
+     */
+    public void loadUrlWithSanitization(final String url) throws InterruptedException {
+        getInstrumentation().runOnMainSync(new Runnable() {
+            @Override
+            public void run() {
+                getActivity().getActiveTab().loadUrlWithSanitization(url);
+            }
+        });
+        waitForActiveShellToBeDoneLoading();
+    }
 }