[Android] Add file-based gtest filtering for gtests on AMP.

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

Index: testing/android/java/src/org/chromium/native_test/ChromeNativeTestActivity.java
diff --git a/testing/android/java/src/org/chromium/native_test/ChromeNativeTestActivity.java b/testing/android/java/src/org/chromium/native_test/ChromeNativeTestActivity.java
index 42befe57cb6bd84ad51c5e0d3cfbfada328b6bae..d476cbcc0198c108d28f30597a3fe6be626ac3b2 100644
--- a/testing/android/java/src/org/chromium/native_test/ChromeNativeTestActivity.java
+++ b/testing/android/java/src/org/chromium/native_test/ChromeNativeTestActivity.java
@@ -7,6 +7,7 @@ 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;
 
@@ -16,6 +17,8 @@ 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
@@ -75,7 +78,16 @@ public class ChromeNativeTestActivity extends Activity {
         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() + "/"

[klundberg, 2015/01/13 19:33:15]

This line seems longer than 80 characters?

[jbudorick, 2015/01/13 19:38:41]

It is, but the java line limit is 100 characters.

[klundberg, 2015/01/13 19:41:16]

Sorry, I don't know what I was thinking as I reviewed the other Java file using
100 characters...long day already:-)

+                        + 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(),