[CustomTabs] Report the navigation start as absolute time

base/android/time_utils.h

Index: base/android/time_utils.h
diff --git a/base/android/time_utils.h b/base/android/time_utils.h
new file mode 100644
index 0000000000000000000000000000000000000000..f5960c52c9e01cbcf0b7b7e77ecb8915634008e9
--- /dev/null
+++ b/base/android/time_utils.h
@@ -0,0 +1,18 @@
+// Copyright 2016 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.
+
+#ifndef BASE_ANDROID_TIME_UTILS_H_
+#define BASE_ANDROID_TIME_UTILS_H_
+
+#include <jni.h>
+
+namespace base {
+namespace android {
+
+bool RegisterTimeUtils(JNIEnv* env);
+
+}  // namespace android
+}  // namespace base
+
+#endif  // BASE_ANDROID_TIME_UTILS_H_