Histograms - Support histograms for Plugins, GPU

content/browser/histogram_message_filter.cc

+// 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.
+
+#include "content/browser/histogram_message_filter.h"
+
+#include "base/process_util.h"
+#include "content/browser/histogram_controller.h"
+#include "content/browser/tcmalloc_internals_request_job.h"
+#include "content/common/child_process_messages.h"
+
+namespace content {
+
+HistogramMessageFilter::HistogramMessageFilter() {
+}
+
+void HistogramMessageFilter::OnChannelConnected(int32 peer_pid) {
+  BrowserMessageFilter::OnChannelConnected(peer_pid);
+}
+
+bool HistogramMessageFilter::OnMessageReceived(const IPC::Message& message,
+                                              bool* message_was_ok) {
+  bool handled = true;
+  IPC_BEGIN_MESSAGE_MAP_EX(HistogramMessageFilter, message, *message_was_ok)
+    IPC_MESSAGE_HANDLER(ChildProcessHostMsg_ChildHistogramData,
+                        OnChildHistogramData)
+    IPC_MESSAGE_UNHANDLED(handled = false)
+  IPC_END_MESSAGE_MAP_EX()
+  return handled;
+}
+
+HistogramMessageFilter::~HistogramMessageFilter() {}
+
+void HistogramMessageFilter::OnChildHistogramData(
+    int sequence_number,
+    const std::vector<std::string>& pickled_histograms) {
+  HistogramController::GetInstance()->OnHistogramDataCollected(
+      sequence_number, pickled_histograms);
+}
+}