Update from https://crrev.com/312398

testing/android/java/src/org/chromium/native_test/ChromeNativeTestActivity.java

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.native_test;
 
 import android.app.Activity;
 import android.content.Context;
 import android.os.Bundle;
+import android.os.Environment;
 import android.os.Handler;
 import android.util.Log;
 
 import org.chromium.base.CommandLine;
 import org.chromium.base.PathUtils;
 import org.chromium.base.PowerMonitor;
 import org.chromium.base.ResourceExtractor;
 import org.chromium.base.library_loader.NativeLibraries;
 
+import java.io.File;
+
 /**
  *  Android's NativeActivity is mostly useful for pure-native code.
  *  Our tests need to go up to our own java classes, which is not possible using
  *  the native activity class loader.
  */
 public class ChromeNativeTestActivity extends Activity {
     public static final String EXTRA_COMMAND_LINE_FILE =
             "org.chromium.native_test.ChromeNativeTestActivity.CommandLineFile";
     public static final String EXTRA_COMMAND_LINE_FLAGS =
             "org.chromium.native_test.ChromeNativeTestActivity.CommandLineFlags";
@@ skipping 39 matching lines @@
                 }
             }, RUN_TESTS_DELAY_IN_MS);
         }
     }
 
     private void runTests() {
         String commandLineFlags = getIntent().getStringExtra(EXTRA_COMMAND_LINE_FLAGS);
         if (commandLineFlags == null) commandLineFlags = "";
 
         String commandLineFilePath = getIntent().getStringExtra(EXTRA_COMMAND_LINE_FILE);
-        if (commandLineFilePath == null) commandLineFilePath = "";
+        if (commandLineFilePath == null) {
+            commandLineFilePath = "";
+        } else {
+            File commandLineFile = new File(commandLineFilePath);
+            if (!commandLineFile.isAbsolute()) {
+                commandLineFilePath = Environment.getExternalStorageDirectory() + "/"
+                        + commandLineFilePath;
+            }
+            Log.i(TAG, "command line file path: " + commandLineFilePath);
+        }
 
         // This directory is used by build/android/pylib/test_package_apk.py.
         nativeRunTests(commandLineFlags, commandLineFilePath, getFilesDir().getAbsolutePath(),
                 getApplicationContext());
     }
 
     // Signal a failure of the native test loader to python scripts
     // which run tests.  For example, we look for
     // RUNNER_FAILED build/android/test_package.py.
     private void nativeTestFailed() {
         Log.e(TAG, "[ RUNNER_FAILED ] could not load native library");
     }
 
     private void loadLibraries() {
         for (String library : NativeLibraries.LIBRARIES) {
             Log.i(TAG, "loading: " + library);
             System.loadLibrary(library);
             Log.i(TAG, "loaded: " + library);
         }
     }
 
     private native void nativeRunTests(String commandLineFlags, String commandLineFilePath,
             String filesDir, Context appContext);
 }