content/browser/histogram_message_filter.h

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CONTENT_BROWSER_HISTOGRAM_MESSAGE_FILTER_H_
   6 #define CONTENT_BROWSER_HISTOGRAM_MESSAGE_FILTER_H_
   7
   8 #include <string>
   9 #include <vector>
  10
  11 #include "content/public/browser/browser_message_filter.h"
  12 #include "content/public/common/process_type.h"
  13
  14 namespace content {
  15
  16 // This class sends and receives histogram messages in the browser process.
  17 class HistogramMessageFilter : public BrowserMessageFilter {
  18  public:
  19   HistogramMessageFilter();
  20
  21   // BrowserMessageFilter implementation.
  22   bool OnMessageReceived(const IPC::Message& message) override;
  23
  24  private:
  25   ~HistogramMessageFilter() override;
  26
  27   // Message handlers.
  28   void OnChildHistogramData(int sequence_number,
  29                             const std::vector<std::string>& pickled_histograms);
  30   void OnGetBrowserHistogram(const std::string& name,
  31                              std::string* histogram_json);
  32
  33   DISALLOW_COPY_AND_ASSIGN(HistogramMessageFilter);
  34 };
  35
  36 }  // namespace content
  37
  38 #endif  // CONTENT_BROWSER_HISTOGRAM_MESSAGE_FILTER_H_