| Index: base/message_loop/message_loop_proxy_impl.cc
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| diff --git a/base/message_loop/message_loop_proxy_impl.cc b/base/message_loop/message_loop_proxy_impl.cc
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| index b7abca377e668270d2f1db89f54c3731de577602..0da21a0b2d3ff6c7ce6d519231ba11f8dcb36813 100644
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| --- a/base/message_loop/message_loop_proxy_impl.cc
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| +++ b/base/message_loop/message_loop_proxy_impl.cc
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| @@ -15,7 +15,12 @@ namespace internal {
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|  MessageLoopProxyImpl::MessageLoopProxyImpl(
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|      scoped_refptr<IncomingTaskQueue> incoming_queue)
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|      : incoming_queue_(incoming_queue),
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| -      valid_thread_id_(PlatformThread::CurrentId()) {
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| +      valid_thread_id_(kInvalidThreadId) {
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| +}
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| +
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| +void MessageLoopProxyImpl::BindToCurrentThread() {
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| +  DCHECK_EQ(kInvalidThreadId, valid_thread_id_);
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| +  valid_thread_id_ = PlatformThread::CurrentId();
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|  }
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|  
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|  bool MessageLoopProxyImpl::PostDelayedTask(
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| 
 |