[Sync] Clean up Android test code a bit.

chrome/android/sync_shell/javatests/src/org/chromium/chrome/browser/sync/ui/PassphraseTypeDialogFragmentTest.java

Index: chrome/android/sync_shell/javatests/src/org/chromium/chrome/browser/sync/ui/PassphraseTypeDialogFragmentTest.java
diff --git a/chrome/android/sync_shell/javatests/src/org/chromium/chrome/browser/sync/ui/PassphraseTypeDialogFragmentTest.java b/chrome/android/sync_shell/javatests/src/org/chromium/chrome/browser/sync/ui/PassphraseTypeDialogFragmentTest.java
index 02731062d62d7705a6cf866d6caedd9de4171d18..9819a901075488d665321ddcd5b6cae144eae1d7 100644
--- a/chrome/android/sync_shell/javatests/src/org/chromium/chrome/browser/sync/ui/PassphraseTypeDialogFragmentTest.java
+++ b/chrome/android/sync_shell/javatests/src/org/chromium/chrome/browser/sync/ui/PassphraseTypeDialogFragmentTest.java
@@ -11,14 +11,13 @@ import android.widget.ListView;
 import org.chromium.base.test.util.Feature;
 import org.chromium.base.test.util.FlakyTest;
 import org.chromium.chrome.R;
-import org.chromium.chrome.browser.ChromeActivity;
-import org.chromium.chrome.test.ChromeActivityTestCaseBase;
+import org.chromium.chrome.browser.sync.SyncTestBase;
 import org.chromium.sync.PassphraseType;
 
 /**
  * Tests to make sure that PassphraseTypeDialogFragment presents the correct options.
  */
-public class PassphraseTypeDialogFragmentTest extends ChromeActivityTestCaseBase<ChromeActivity> {
+public class PassphraseTypeDialogFragmentTest extends SyncTestBase {
     private static final String TAG = "PassphraseTypeDialogFragmentTest";
 
     private static final boolean ENABLED = true;
@@ -39,15 +38,6 @@ public class PassphraseTypeDialogFragmentTest extends ChromeActivityTestCaseBase
 
     private PassphraseTypeDialogFragment mTypeFragment;
 
-    public PassphraseTypeDialogFragmentTest() {
-        super(ChromeActivity.class);
-    }
-
-    @Override
-    public void startMainActivity() throws InterruptedException {
-        startMainActivityOnBlankPage();
-    }
-
     @SmallTest
     @Feature({"Sync"})
     public void testKeystoreEncryptionOptions() throws Exception {