VisualBenchTest: Write JSON output

platform_tools/android/apps/visualbench/src/main/java/com/skia/VisualBenchTestActivity.java

Index: platform_tools/android/apps/visualbench/src/main/java/com/skia/VisualBenchTestActivity.java
diff --git a/platform_tools/android/apps/visualbench/src/main/java/com/skia/VisualBenchTestActivity.java b/platform_tools/android/apps/visualbench/src/main/java/com/skia/VisualBenchTestActivity.java
index 3e2bfd867c305188994603a0c2cc32a52fd8d17c..2edd8163062be4fc02e9ff9e906707d118cb831f 100644
--- a/platform_tools/android/apps/visualbench/src/main/java/com/skia/VisualBenchTestActivity.java
+++ b/platform_tools/android/apps/visualbench/src/main/java/com/skia/VisualBenchTestActivity.java
@@ -29,7 +29,7 @@ public class VisualBenchTestActivity extends ActivityUnitTestCase<VisualBenchAct
         String pkg = getInstrumentation().getTargetContext().getPackageName();
         Intent intent = new Intent(getInstrumentation().getTargetContext(),
                                    VisualBenchActivity.class);
-        intent.putExtra("cmdLineFlags", "");
+        intent.putExtra("cmdLineFlags", "--outResultsFile /sdcard/skia_results/visualbench.json");

[borenet, 2015/08/20 14:05:16]

Eventually I need to figure out how to pass this value dynamically.  For now
it's hard-coded.

         mActivity = launchActivityWithIntent(pkg, VisualBenchActivity.class, intent);
 
         assertNotNull("mActivity is null", mActivity);