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

base/android/callback_android.cc

Index: base/android/callback_android.cc
diff --git a/base/android/callback_android.cc b/base/android/callback_android.cc
index 8c56f9896dc6d039bc820604b7976201962c1910..2326d85524b72dc32a11cc518df58455530a5d90 100644
--- a/base/android/callback_android.cc
+++ b/base/android/callback_android.cc
@@ -12,19 +12,17 @@ namespace android {
 void RunCallbackAndroid(const JavaRef<jobject>& callback,
                         const JavaRef<jobject>& arg) {
   Java_Callback_onResultFromNativeV_JLO(base::android::AttachCurrentThread(),
-                                        callback.obj(),
-                                        arg.obj());
+                                        callback, arg);
 }
 
 void RunCallbackAndroid(const JavaRef<jobject>& callback, bool arg) {
   Java_Callback_onResultFromNativeV_Z(base::android::AttachCurrentThread(),
-                                      callback.obj(),
-                                      static_cast<jboolean>(arg));
+                                      callback, static_cast<jboolean>(arg));
 }
 
 void RunCallbackAndroid(const JavaRef<jobject>& callback, int arg) {
   Java_Callback_onResultFromNativeV_I(base::android::AttachCurrentThread(),
-                                      callback.obj(), arg);
+                                      callback, arg);
 }
 
 }  // namespace android