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torne authored
Add a move constructor and move assignment operator to local, global and weak references to reduce reference churn (saves a small number of bytes). Allow weak references to be constructed from JavaRef. Replace NULL with nullptr in jni_weak_ref code. BUG= Review-Url: https://codereview.chromium.org/2268553002 Cr-Commit-Position: refs/heads/master@{#414444}
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