Remove all remaining traces of MessageLoopProxy.

content/browser/storage_partition_impl_map.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 "content/browser/storage_partition_impl_map.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/callback.h"
@@ skipping 64 matching lines @@
     scoped_refptr<Stream> stream =
         stream_context_->registry()->GetStream(request->url());
     if (stream.get())
       return new StreamURLRequestJob(request, network_delegate, stream);
 
     if (!blob_protocol_handler_) {
       // Construction is deferred because 'this' is constructed on
       // the main thread but we want blob_protocol_handler_ constructed
       // on the IO thread.
       blob_protocol_handler_.reset(new storage::BlobProtocolHandler(
-          blob_storage_context_->context(),
-          file_system_context_.get(),
-          BrowserThread::GetMessageLoopProxyForThread(BrowserThread::FILE)
-              .get()));
+          blob_storage_context_->context(), file_system_context_.get(),
+          BrowserThread::GetTaskRunnerForThread(BrowserThread::FILE).get()));
     }
     return blob_protocol_handler_->MaybeCreateJob(request, network_delegate);
   }
 
  private:
   const scoped_refptr<ChromeBlobStorageContext> blob_storage_context_;
   const scoped_refptr<StreamContext> stream_context_;
   const scoped_refptr<storage::FileSystemContext> file_system_context_;
   mutable std::unique_ptr<storage::BlobProtocolHandler> blob_protocol_handler_;
   DISALLOW_COPY_AND_ASSIGN(BlobProtocolHandler);
@@ skipping 510 matching lines @@
 
     // We do not call InitializeURLRequestContext() for media contexts because,
     // other than the HTTP cache, the media contexts share the same backing
     // objects as their associated "normal" request context.  Thus, the previous
     // call serves to initialize the media request context for this storage
     // partition as well.
   }
 }
 
 }  // namespace content