| // 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. |
| |
| #ifndef CONTENT_CHILD_HISTOGRAM_MESSAGE_FILTER_H_ |
| #define CONTENT_CHILD_HISTOGRAM_MESSAGE_FILTER_H_ |
| |
| #include <string> |
| #include <vector> |
| |
| #include "base/basictypes.h" |
| #include "base/memory/scoped_ptr.h" |
| #include "ipc/message_filter.h" |
| |
| namespace base { |
| class HistogramDeltaSerialization; |
| class MessageLoopProxy; |
| } // namespace base |
| |
| namespace content { |
| |
| class ChildHistogramMessageFilter : public IPC::MessageFilter { |
| public: |
| ChildHistogramMessageFilter(); |
| |
| // IPC::MessageFilter implementation. |
| virtual void OnFilterAdded(IPC::Sender* sender) OVERRIDE; |
| virtual void OnFilterRemoved() OVERRIDE; |
| virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE; |
| |
| void SendHistograms(int sequence_number); |
| |
| private: |
| typedef std::vector<std::string> HistogramPickledList; |
| |
| virtual ~ChildHistogramMessageFilter(); |
| |
| // Message handlers. |
| virtual void OnGetChildHistogramData(int sequence_number); |
| |
| // Extract snapshot data and then send it off the the Browser process. |
| // Send only a delta to what we have already sent. |
| void UploadAllHistograms(int sequence_number); |
| |
| IPC::Sender* sender_; |
| |
| scoped_refptr<base::MessageLoopProxy> io_message_loop_; |
| |
| // Prepares histogram deltas for transmission. |
| scoped_ptr<base::HistogramDeltaSerialization> histogram_delta_serialization_; |
| |
| DISALLOW_COPY_AND_ASSIGN(ChildHistogramMessageFilter); |
| }; |
| |
| } // namespace content |
| |
| #endif // CONTENT_CHILD_HISTOGRAM_MESSAGE_FILTER_H_ |