Implement some follow-ups after mojofiction of Push-messaging.

content/child/push_messaging/push_provider.h

 // Copyright 2014 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 CONTENT_CHILD_PUSH_MESSAGING_PUSH_PROVIDER_H_
 #define CONTENT_CHILD_PUSH_MESSAGING_PUSH_PROVIDER_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 49 matching lines @@
       const blink::WebPushSubscriptionOptions& options,
       std::unique_ptr<blink::WebPushPermissionStatusCallbacks> callbacks)
       override;
 
  private:
   explicit PushProvider(const scoped_refptr<base::SingleThreadTaskRunner>&
                             main_thread_task_runner);
 
   static void GetInterface(mojom::PushMessagingRequest request);
 
-  void SubscribeCallback(
+  void DidSubscribe(
       std::unique_ptr<blink::WebPushSubscriptionCallbacks> callbacks,
       content::PushRegistrationStatus status,
       const base::Optional<GURL>& endpoint,
       const base::Optional<content::PushSubscriptionOptions>& options,
       const base::Optional<std::vector<uint8_t>>& p256dh,
       const base::Optional<std::vector<uint8_t>>& auth);
 
-  void UnsubscribeCallback(
+  void DidUnsubscribe(
       std::unique_ptr<blink::WebPushUnsubscribeCallbacks> callbacks,
       bool is_success,
       bool did_unsubscribe,
       blink::WebPushError::ErrorType error_type,
       const base::Optional<std::string>& error_message);
 
-  void GetSubscriptionCallback(
+  void DidGetSubscription(
       std::unique_ptr<blink::WebPushSubscriptionCallbacks> callbacks,
       content::PushGetRegistrationStatus status,
       const base::Optional<GURL>& endpoint,
       const base::Optional<content::PushSubscriptionOptions>& options,
       const base::Optional<std::vector<uint8_t>>& p256dh,
       const base::Optional<std::vector<uint8_t>>& auth);
 
-  void GetPermissionStatusCallback(
+  void DidGetPermissionStatus(
       std::unique_ptr<blink::WebPushPermissionStatusCallbacks> callbacks,
       bool is_success,
       blink::WebPushPermissionStatus status,
       blink::WebPushError::ErrorType error);
 
   mojom::PushMessagingPtr push_messaging_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(PushProvider);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_CHILD_PUSH_MESSAGING_PUSH_PROVIDER_H_