Remove now-unnecessary .obj() in Java method calls.

android_webview/native/cookie_manager.cc

Index: android_webview/native/cookie_manager.cc
diff --git a/android_webview/native/cookie_manager.cc b/android_webview/native/cookie_manager.cc
index 05bb0ced088ca850162716a319cf2ccd17de2d33..df5b1c86ccdb05840d058ddd1bbb75182ba8f7cd 100644
--- a/android_webview/native/cookie_manager.cc
+++ b/android_webview/native/cookie_manager.cc
@@ -79,8 +79,7 @@ class BoolCookieCallbackHolder {
   void Invoke(bool result) {
     if (!callback_.is_null()) {
       JNIEnv* env = base::android::AttachCurrentThread();
-      Java_AwCookieManager_invokeBooleanCookieCallback(env, callback_.obj(),
-                                                       result);
+      Java_AwCookieManager_invokeBooleanCookieCallback(env, callback_, result);
     }
   }