[Android] Java Bridge with Gin: implement Java methods invocation

base/android/jni_weak_ref.h

Index: base/android/jni_weak_ref.h
diff --git a/base/android/jni_weak_ref.h b/base/android/jni_weak_ref.h
index ef39b8aedbce91f38d5bc8508b19ef55b62538c1..943e2bb3e86f1119518954c3c1df15f97c494bea 100644
--- a/base/android/jni_weak_ref.h
+++ b/base/android/jni_weak_ref.h
@@ -25,6 +25,8 @@ class BASE_EXPORT JavaObjectWeakGlobalRef {
 
   base::android::ScopedJavaLocalRef<jobject> get(JNIEnv* env) const;
 
+  bool is_null() const { return obj_ == NULL; }

[bulach, 2014/06/09 11:44:33]

hmm... :)

this can be misleading, it'd be possible to is_null() == false, and yet, get()
can return a "real object" that can be NULL...

how about "is_initialized()", or "has_reference()" ?

[mnaganov (inactive), 2014/06/11 13:50:44]

Thanks for raising this! Indeed, is_null() seems to be misleading.

My preference will be is_empty() -- also looks informative(and is similar to the
terminology used in variant types) and is short.

+
   void reset();
 
  private: