New Task Manager - Phase 1.1: Implement Browser Process Task Providing

chrome/browser/task_management/providers/task.cc

+// Copyright 2015 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 "chrome/browser/task_management/providers/task.h"
+
+namespace task_management {
+
+namespace {
+
+// The last ID given to the previously created task.
+int64 g_last_id = 0;
+
+}  // namespace
+
+
+Task::Task(const base::string16& title,
+           const gfx::ImageSkia& icon,
+           base::ProcessHandle handle)
+    : task_id_(g_last_id++),
+      network_usage_(-1),
+      current_byte_count_(-1),
+      title_(title),
+      icon_(icon),
+      process_handle_(handle) {
+}
+
+Task::~Task() {
+}
+
+void Task::Refresh(const base::TimeDelta& update_interval) {
+  // TODO(afakhry): Add code here to skip this when network usage refresh has
+  // never been requested.
+
+  if (current_byte_count_ == -1)
+    return;
+
+  network_usage_ =
+      (current_byte_count_ * base::TimeDelta::FromSeconds(1)) / update_interval;
+
+  // Reset the current byte count for this task.
+  current_byte_count_ = 0;
+}
+
+void Task::OnNetworkBytesRead(int64 bytes_read) {
+  if (current_byte_count_ == -1)
+    current_byte_count_ = 0;
+
+  current_byte_count_ += bytes_read;
+}
+
+base::string16 Task::GetProfileName() const {
+  return base::string16();
+}
+
+int Task::GetRoutingID() const {
+  return 0;
+}
+
+bool Task::ReportsSqliteMemory() const {
+  return GetSqliteMemoryUsed() != -1;
+}
+
+int64 Task::GetSqliteMemoryUsed() const {
+  return -1;
+}
+
+bool Task::ReportsV8Memory() const {
+  return GetV8MemoryAllocated() != -1;
+}
+
+int64 Task::GetV8MemoryAllocated() const {
+  return -1;
+}
+
+int64 Task::GetV8MemoryUsed() const {
+  return -1;
+}
+
+bool Task::ReportsWebCacheStats() const {
+  return false;
+}
+
+blink::WebCache::ResourceTypeStats Task::GetWebCacheStats() const {
+  return blink::WebCache::ResourceTypeStats();
+}
+
+bool Task::ReportsNetworkUsage() const {
+  return network_usage_ != -1;
+}
+
+}  // namespace task_management