indexeddb: Deleted unneeded raw pointer use.

IndexedDBControlWrapper::BindRemoteIfNeeded gets a raw pointer
to immediately wrap it with a scoped_refptr - which it already
has. This change uses that existing pointer.

This is a cleanup change - not expected to change any behavior.

Bug: none
Change-Id: I8b61717dcbb652d80ad7e80fde0a1e4ab108e5e4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2569781Reviewed-by: Victor Costan <pwnall@chromium.org>
Commit-Queue: Victor Costan <pwnall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#834516}

content/browser/indexed_db/indexed_db_control_wrapper.cc

@@ -205,11 +205,9 @@ void IndexedDBControlWrapper::BindRemoteIfNeeded() {
 
   if (indexed_db_control_.is_bound())
     return;
-  IndexedDBContextImpl* idb_context = GetIndexedDBContextInternal();
-  idb_context->IDBTaskRunner()->PostTask(
+  context_->IDBTaskRunner()->PostTask(
       FROM_HERE,
-      base::BindOnce(&IndexedDBContextImpl::Bind,
-                     base::WrapRefCounted(idb_context),
+      base::BindOnce(&IndexedDBContextImpl::Bind, context_,
                      indexed_db_control_.BindNewPipeAndPassReceiver()));
 }