Collect profiler stats from browser child processes.

content/browser/profiler_controller.cc

+// Copyright (c) 2011 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/profiler_controller.h"
+
+#include "base/bind.h"
+#include "content/browser/browser_message_filter.h"
+#include "content/browser/profiler_message_filter.h"
+
+using content::BrowserThread;
+
+ProfilerSubscriber::~ProfilerSubscriber() {
+}
+
+ProfilerController::ProfilerController() : subscriber_(NULL) {
+}
+
+ProfilerController::~ProfilerController() {
+}
+
+ProfilerController* ProfilerController::GetInstance() {
+  return Singleton<ProfilerController>::get();
+}
+
+void ProfilerController::RegisterSubscriber(ProfilerSubscriber* subscriber) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  DCHECK(!subscriber_);
+  subscriber_ = subscriber;
+}
+
+void ProfilerController::CancelSubscriber(ProfilerSubscriber* subscriber) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+
+  if (subscriber == subscriber_) {
+    subscriber_ = NULL;
+  }
+}
+
+void ProfilerController::OnProfilerDataCollected(
+    int sequence_number,
+    const std::string& profiler_data) {
+  if (subscriber_) {
+    subscriber_->OnBrowserChildProfilerDataCollected(
+        sequence_number, profiler_data);
+  }
+}
+
+void ProfilerController::OnIsProfilerEnabled(base::ProcessId child_process_id) {
+  if (subscriber_) {
+    subscriber_->OnIsProfilerEnabledForChildProcess(child_process_id);
+  }
+}