[IndexedDB] Closing mojo connections when renderer quits

mojo/public/cpp/bindings/associated_binding.h

 // Copyright 2015 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.
 
 #ifndef MOJO_PUBLIC_CPP_BINDINGS_ASSOCIATED_BINDING_H_
 #define MOJO_PUBLIC_CPP_BINDINGS_ASSOCIATED_BINDING_H_
 
 #include <memory>
 #include <string>
 #include <utility>
@@ skipping 78 matching lines @@
 // synchrounous method calls may not be run from this task runner, when they
 // reenter outgoing synchrounous calls on the same thread.
 template <typename Interface,
           typename ImplRefTraits = RawPtrImplRefTraits<Interface>>
 class AssociatedBinding : public AssociatedBindingBase {
  public:
   using ImplPointerType = typename ImplRefTraits::PointerType;
 
   // Constructs an incomplete associated binding that will use the
   // implementation |impl|. It may be completed with a subsequent call to the
   // |Bind| method. Does not take ownership of |impl|, which must outlive this

[cmumford, 2017/03/07 20:24:23]

Doesn't moving |impl| mean that we're taking ownership of |impl|?

[dmurph, 2017/03/09 20:44:15]

Done.

   // object.
-  explicit AssociatedBinding(ImplPointerType impl) { stub_.set_sink(impl); }
+  explicit AssociatedBinding(ImplPointerType impl) {
+    stub_.set_sink(std::move(impl));
+  }
 
   // Constructs a completed associated binding of |impl|. The output |ptr_info|
   // should be sent by another interface. |impl| must outlive this object.
   AssociatedBinding(ImplPointerType impl,
                     AssociatedInterfacePtrInfo<Interface>* ptr_info,
                     scoped_refptr<base::SingleThreadTaskRunner> runner =
                         base::ThreadTaskRunnerHandle::Get())
       : AssociatedBinding(std::move(impl)) {
     Bind(ptr_info, std::move(runner));
   }
@@ skipping 50 matching lines @@
 
  private:
   typename Interface::template Stub_<ImplRefTraits> stub_;
 
   DISALLOW_COPY_AND_ASSIGN(AssociatedBinding);
 };
 
 }  // namespace mojo
 
 #endif  // MOJO_PUBLIC_CPP_BINDINGS_ASSOCIATED_BINDING_H_