[android_webview] Add a generic callback JNI bridge.

android_webview/native/android_webview_jni_registrar.cc

Index: android_webview/native/android_webview_jni_registrar.cc
diff --git a/android_webview/native/android_webview_jni_registrar.cc b/android_webview/native/android_webview_jni_registrar.cc
index 47c7373a9b080a93d7a77c2a5c08f3605c5644c5..1d0b2a25509f9c995670cd193a2029fec2cd55ac 100644
--- a/android_webview/native/android_webview_jni_registrar.cc
+++ b/android_webview/native/android_webview_jni_registrar.cc
@@ -11,6 +11,7 @@
 #include "android_webview/native/aw_resource.h"
 #include "android_webview/native/aw_settings.h"
 #include "android_webview/native/aw_web_contents_delegate.h"
+#include "android_webview/native/callback_jni_bridge.h"
 #include "android_webview/native/cookie_manager.h"
 #include "android_webview/native/input_stream_impl.h"
 #include "android_webview/native/intercepted_request_data_impl.h"
@@ -30,6 +31,7 @@ static base::android::RegistrationMethod kWebViewRegisteredMethods[] = {
   { "AwHttpAuthHandler", RegisterAwHttpAuthHandler },
   { "AwResource", AwResource::RegisterAwResource },
   { "AwWebContentsDelegate", RegisterAwWebContentsDelegate },
+  { "CallbackJNIBridge", RegisterCallbackJNIBridge },
   { "CookieManager", RegisterCookieManager },
   { "InterceptedRequestDataImpl", RegisterInterceptedRequestData },
   { "InputStream", RegisterInputStream },