Small improvements to JNI references.

base/android/scoped_java_ref_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/android/scoped_java_ref.h"
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_string.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ skipping 88 matching lines @@
     EXPECT_EQ(1, g_local_refs);
     EXPECT_EQ(2, g_global_refs);
 
     ScopedJavaLocalRef<jstring> str2(env, str.Release());
     EXPECT_EQ(1, g_local_refs);
     {
       ScopedJavaLocalRef<jstring> str3(str2);
       EXPECT_EQ(2, g_local_refs);
     }
     EXPECT_EQ(1, g_local_refs);
+    {
+      ScopedJavaLocalRef<jstring> str4((ScopedJavaLocalRef<jstring>(str2)));
+      EXPECT_EQ(2, g_local_refs);
+    }
+    EXPECT_EQ(1, g_local_refs);
+    {
+      ScopedJavaLocalRef<jstring> str5;
+      str5 = ScopedJavaLocalRef<jstring>(str2);
+      EXPECT_EQ(2, g_local_refs);
+    }
+    EXPECT_EQ(1, g_local_refs);
     str2.Reset();
     EXPECT_EQ(0, g_local_refs);
     global_str.Reset();
     EXPECT_EQ(1, g_global_refs);
     ScopedJavaGlobalRef<jobject> global_obj2(global_obj);
     EXPECT_EQ(2, g_global_refs);
   }
 
   EXPECT_EQ(0, g_local_refs);
   EXPECT_EQ(0, g_global_refs);
 }
 
 }  // namespace android
 }  // namespace base