Adding util methods to deal with Java string arrays using string16.

base/android/jni_array.h

Index: base/android/jni_array.h
diff --git a/base/android/jni_array.h b/base/android/jni_array.h
index fea5548fe84ea3498e54c4ce5bc7b9e8ceb90ef5..087eb37e6ce7db5e31e4ecf26897c0a263af8ca2 100644
--- a/base/android/jni_array.h
+++ b/base/android/jni_array.h
@@ -11,6 +11,7 @@
 
 #include "base/android/scoped_java_ref.h"
 #include "base/basictypes.h"
+#include "base/string16.h"
 
 namespace base {
 namespace android {
@@ -26,6 +27,14 @@ ScopedJavaLocalRef<jobjectArray> ToJavaArrayOfByteArray(
 ScopedJavaLocalRef<jobjectArray> ToJavaArrayOfStrings(
     JNIEnv* env,  const std::vector<std::string>& v);
 
+ScopedJavaLocalRef<jobjectArray> ToJavaArrayOfStrings(
+    JNIEnv* env,  const std::vector<string16>& v);
+
+// Converts a Java string array to a native array.
+void AppendJavaStringArrayToStringVector(JNIEnv* env,
+                                         const JavaRef<jobjectArray>& array,
+                                         std::vector<string16>* out);
+
 // Appends the Java bytes in |bytes_array| onto the end of |out|.
 void AppendJavaByteArrayToByteVector(JNIEnv* env,
                                      jbyteArray byte_array,