[Android] Log uncaught Java exceptions when running native tests.

testing/android/appurify_support/java/src/org/chromium/test/support/RobotiumBundleGenerator.java

Index: testing/android/appurify_support/java/src/org/chromium/test/support/RobotiumBundleGenerator.java
diff --git a/testing/android/appurify_support/java/src/org/chromium/test/support/RobotiumBundleGenerator.java b/testing/android/appurify_support/java/src/org/chromium/test/support/RobotiumBundleGenerator.java
index e006954cfb2d9dedcab12dcfa3949b0562330a65..d102692db711f26ecc0f48bb7596016a9b1e5a8f 100644
--- a/testing/android/appurify_support/java/src/org/chromium/test/support/RobotiumBundleGenerator.java
+++ b/testing/android/appurify_support/java/src/org/chromium/test/support/RobotiumBundleGenerator.java
@@ -18,6 +18,11 @@ public class RobotiumBundleGenerator implements ResultsBundleGenerator {
     private static final String TAG = "RobotiumBundleGenerator";
 
     public Bundle generate(Map<String, ResultsBundleGenerator.TestResult> rawResults) {
+        Bundle resultsBundle = new Bundle();
+        if (rawResults.isEmpty()) {
+            return resultsBundle;
+        }
+
         int testsPassed = 0;
         int testsFailed = 0;
         int testsErrored = 0;
@@ -53,7 +58,6 @@ public class RobotiumBundleGenerator implements ResultsBundleGenerator {
             resultBuilder.append("\nOK (" + Integer.toString(testsPassed) + " tests)");
         }
 
-        Bundle resultsBundle = new Bundle();
         resultsBundle.putString(Instrumentation.REPORT_KEY_STREAMRESULT,
                 resultBuilder.toString());
         return resultsBundle;