Revert of Deletes mojo::Callback

mojo/public/cpp/bindings/lib/control_message_proxy.cc

 // 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.
 
 #include "mojo/public/cpp/bindings/lib/control_message_proxy.h"
 
 #include <stddef.h>
 #include <stdint.h>
 #include <utility>
 
 #include "base/bind.h"
 #include "base/macros.h"
 #include "mojo/public/cpp/bindings/lib/message_builder.h"
 #include "mojo/public/cpp/bindings/lib/serialization.h"
 #include "mojo/public/cpp/bindings/message.h"
 #include "mojo/public/interfaces/bindings/interface_control_messages.mojom.h"
 
 namespace mojo {
 namespace internal {
 
 namespace {
 
-using RunCallback = base::Callback<void(QueryVersionResultPtr)>;
+using RunCallback = Callback<void(QueryVersionResultPtr)>;
 
 class RunResponseForwardToCallback : public MessageReceiver {
  public:
   RunResponseForwardToCallback(const RunCallback& callback)
       : callback_(callback) {}
   bool Accept(Message* message) override;
 
  private:
   RunCallback callback_;
   DISALLOW_COPY_AND_ASSIGN(RunResponseForwardToCallback);
@@ skipping 47 matching lines @@
   MessageBuilder builder(kRunOrClosePipeMessageId, size);
 
   RunOrClosePipeMessageParams_Data* params = nullptr;
   Serialize<RunOrClosePipeMessageParamsPtr>(params_ptr, builder.buffer(),
                                             &params, context);
   params->EncodePointers();
   bool ok = receiver->Accept(builder.message());
   ALLOW_UNUSED_LOCAL(ok);
 }
 
-void RunVersionCallback(const base::Callback<void(uint32_t)>& callback,
+void RunVersionCallback(const Callback<void(uint32_t)>& callback,
                         QueryVersionResultPtr query_version_result) {
   callback.Run(query_version_result->version);
 }
 
 }  // namespace
 
 ControlMessageProxy::ControlMessageProxy(MessageReceiverWithResponder* receiver)
     : receiver_(receiver) {
 }
 
 void ControlMessageProxy::QueryVersion(
-    const base::Callback<void(uint32_t)>& callback) {
+    const Callback<void(uint32_t)>& callback) {
   SendRunMessage(receiver_, QueryVersion::New(),
                  base::Bind(&RunVersionCallback, callback), &context_);
 }
 
 void ControlMessageProxy::RequireVersion(uint32_t version) {
   RequireVersionPtr require_version(RequireVersion::New());
   require_version->version = version;
   SendRunOrClosePipeMessage(receiver_, std::move(require_version), &context_);
 }
 
 }  // namespace internal
 }  // namespace mojo