Starting a refactor to allow adding metrics on upload.

chrome/browser/android/feature_utilities.cc

+// Copyright 2014 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.
+
+#include "chrome/browser/android/feature_utilities.h"
+
+#include "jni/FeatureUtilities_jni.h"
+
+namespace {
+  static bool document_mode_enabled = false;

[Alexei Svitkine (slow), 2014/10/20 21:19:27]

Nit: No need for "static" inside an anon namespace. Also, de-indent this.

+} // namespace
+
+namespace chrome {
+namespace android {
+
+RunningModeHistogram GetDocumentModeValue() {
+  return document_mode_enabled ? RUNNING_MODE_DOCUMENT_MODE :
+      RUNNING_MODE_TABBED_MODE;
+}
+
+} // namespace android
+} // namespace chrome
+
+
+static void SetDocumentModeEnabled(JNIEnv* env,
+                                   jclass clazz,
+                                   jboolean enabled) {
+  document_mode_enabled = enabled;
+}
+
+bool RegisterFeatureUtilities(JNIEnv* env) {
+  return RegisterNativesImpl(env);
+}