Upstream Android's PathUtils implementation.

base/android/java/org/chromium/base/CalledByNative.java

Index: base/android/java/org/chromium/base/CalledByNative.java
diff --git a/base/android/java/org/chromium/base/CalledByNative.java b/base/android/java/org/chromium/base/CalledByNative.java
new file mode 100644
index 0000000000000000000000000000000000000000..086be324a08f5cb396cbdadbfc59f3cfdddddd4d
--- /dev/null
+++ b/base/android/java/org/chromium/base/CalledByNative.java
@@ -0,0 +1,19 @@
+// Copyright (c) 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.base;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+// This annotation is used by the JNI generator to create the necessary JNI
+// bindings and expose this method to native code.
+@Target(ElementType.METHOD)
+@Retention(RetentionPolicy.RUNTIME)
+public @interface CalledByNative {
+    // If present, tells which inner class the method belongs to.
+    public String value() default "";
+}