[Offline Pages] Fix test harness failure related with batch size.

Fixed the test failure due to not setting default batch size in script.

BUG=673519

Review-Url: https://codereview.chromium.org/2567983005
Cr-Commit-Position: refs/heads/master@{#438032}

chrome/android/javatests/src/org/chromium/chrome/browser/offlinepages/OfflinePageSavePageLaterEvaluationTest.java

@@ -119,6 +119,7 @@ public class OfflinePageSavePageLaterEvaluationTest
         ThreadUtils.runOnUiThread(new Runnable() {
             @Override
             public void run() {
+                assert mBridge != null;
                 mBridge.getRequestsInQueue(new Callback<SavePageRequest[]>() {
                     @Override
                     public void onResult(SavePageRequest[] results) {
@@ -481,6 +482,9 @@ public class OfflinePageSavePageLaterEvaluationTest
             Log.e(TAG, e.getMessage(), e);
             fail(String.format(
                     "Config file %s is not found, aborting the test.", CONFIG_FILE_PATH));
+        } catch (NumberFormatException e) {
+            Log.e(TAG, e.getMessage(), e);
+            fail("Error parsing config file, aborting test.");
         } finally {
             if (inputStream != null) {
                 inputStream.close();

chrome/browser/android/offline_pages/evaluation/run_offline_page_evaluation_test.py

@@ -89,6 +89,7 @@ def main(args):
       output_dir=os.path.expanduser('~/offline_eval_output'),
       user_request=DEFAULT_USER_REQUEST,
       user_test_scheduler=DEFAULT_USE_TEST_SCHEDULER,
+      schedule_batch_size=DEFAULT_BATCH_SIZE,
       verbose=DEFAULT_VERBOSE)
 
   def get_adb_command(args):