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   virtual bool OnMessageReceived(const IPC::Message& message,
  23                                  bool* message_was_ok) OVERRIDE;
  24
  25  private:
  26   virtual ~HistogramMessageFilter();
  27
  28   // Message handlers.
  29   void OnChildHistogramData(int sequence_number,
  30                             const std::vector<std::string>& pickled_histograms);
  31   void OnGetBrowserHistogram(const std::string& name,
  32                              std::string* histogram_json);
  33
  34   DISALLOW_COPY_AND_ASSIGN(HistogramMessageFilter);
  35 };
  36
  37 }  // namespace content
  38
  39 #endif  // CONTENT_BROWSER_HISTOGRAM_MESSAGE_FILTER_H_