[ServiceWorker] Add EmbeddedWorkerInstanceHost Interface.

content/renderer/service_worker/embedded_worker_dispatcher.cc

-// Copyright 2013 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/renderer/service_worker/embedded_worker_dispatcher.h"
-
-#include <memory>
-#include <utility>
-
-#include "base/memory/ptr_util.h"
-#include "base/metrics/histogram_macros.h"
-#include "base/strings/string16.h"
-#include "base/strings/utf_string_conversions.h"
-#include "content/child/child_process.h"
-#include "content/child/thread_safe_sender.h"
-#include "content/child/worker_thread_registry.h"
-#include "content/common/devtools_messages.h"
-#include "content/common/service_worker/embedded_worker_messages.h"
-#include "content/public/common/content_client.h"
-#include "content/renderer/render_thread_impl.h"
-#include "content/renderer/service_worker/embedded_worker_devtools_agent.h"
-#include "content/renderer/service_worker/embedded_worker_instance_client_impl.h"
-#include "content/renderer/service_worker/service_worker_context_client.h"
-#include "third_party/WebKit/public/platform/WebString.h"
-#include "third_party/WebKit/public/platform/WebURL.h"
-#include "third_party/WebKit/public/web/WebEmbeddedWorker.h"
-#include "third_party/WebKit/public/web/WebEmbeddedWorkerStartData.h"
-
-namespace content {
-
-EmbeddedWorkerDispatcher::WorkerWrapper::WorkerWrapper(
-    blink::WebEmbeddedWorker* worker,
-    int devtools_agent_route_id)
-    : worker_(worker),
-      devtools_agent_(
-          new EmbeddedWorkerDevToolsAgent(worker, devtools_agent_route_id)) {}
-
-EmbeddedWorkerDispatcher::WorkerWrapper::~WorkerWrapper() {}
-
-EmbeddedWorkerDispatcher::EmbeddedWorkerDispatcher() : weak_factory_(this) {}
-
-EmbeddedWorkerDispatcher::~EmbeddedWorkerDispatcher() {}
-
-bool EmbeddedWorkerDispatcher::OnMessageReceived(
-    const IPC::Message& message) {
-  bool handled = true;
-  IPC_BEGIN_MESSAGE_MAP(EmbeddedWorkerDispatcher, message)
-    IPC_MESSAGE_HANDLER(EmbeddedWorkerMsg_StopWorker, OnStopWorker)
-    IPC_MESSAGE_UNHANDLED(handled = false)
-  IPC_END_MESSAGE_MAP()
-  return handled;
-}
-
-void EmbeddedWorkerDispatcher::WorkerContextDestroyed(
-    int embedded_worker_id) {
-  RenderThreadImpl::current()->thread_safe_sender()->Send(
-      new EmbeddedWorkerHostMsg_WorkerStopped(embedded_worker_id));
-  UnregisterWorker(embedded_worker_id);
-}
-
-void EmbeddedWorkerDispatcher::OnStopWorker(int embedded_worker_id) {
-  TRACE_EVENT0("ServiceWorker", "EmbeddedWorkerDispatcher::OnStopWorker");
-  WorkerWrapper* wrapper = workers_.Lookup(embedded_worker_id);
-  // OnStopWorker is possible to be called twice.
-  if (!wrapper) {
-    LOG(WARNING) << "Got OnStopWorker for nonexistent worker";
-    return;
-  }
-  // This should eventually call WorkerContextDestroyed. (We may need to post
-  // a delayed task to forcibly abort the worker context if we find it
-  // necessary)
-  stop_worker_times_[embedded_worker_id] = base::TimeTicks::Now();
-  wrapper->worker()->TerminateWorkerContext();
-}
-
-std::unique_ptr<EmbeddedWorkerDispatcher::WorkerWrapper>
-EmbeddedWorkerDispatcher::StartWorkerContext(
-    const EmbeddedWorkerStartParams& params,
-    std::unique_ptr<ServiceWorkerContextClient> context_client) {
-  std::unique_ptr<WorkerWrapper> wrapper(new WorkerWrapper(
-      blink::WebEmbeddedWorker::Create(context_client.release(), nullptr),
-      params.worker_devtools_agent_route_id));
-
-  blink::WebEmbeddedWorkerStartData start_data;
-  start_data.script_url = params.script_url;
-  start_data.user_agent =
-      blink::WebString::FromUTF8(GetContentClient()->GetUserAgent());
-  start_data.wait_for_debugger_mode =
-      params.wait_for_debugger
-          ? blink::WebEmbeddedWorkerStartData::kWaitForDebugger
-          : blink::WebEmbeddedWorkerStartData::kDontWaitForDebugger;
-  start_data.v8_cache_options = static_cast<blink::WebSettings::V8CacheOptions>(
-      params.settings.v8_cache_options);
-  start_data.data_saver_enabled = params.settings.data_saver_enabled;
-  start_data.pause_after_download_mode =
-      params.pause_after_download
-          ? blink::WebEmbeddedWorkerStartData::kPauseAfterDownload
-          : blink::WebEmbeddedWorkerStartData::kDontPauseAfterDownload;
-
-  wrapper->worker()->StartWorkerContext(start_data);
-  return wrapper;
-}
-
-void EmbeddedWorkerDispatcher::RegisterWorker(
-    int embedded_worker_id,
-    std::unique_ptr<WorkerWrapper> wrapper) {
-  workers_.AddWithID(std::move(wrapper), embedded_worker_id);
-}
-
-void EmbeddedWorkerDispatcher::UnregisterWorker(int embedded_worker_id) {
-  if (ContainsKey(stop_worker_times_, embedded_worker_id)) {
-    base::TimeTicks stop_time = stop_worker_times_[embedded_worker_id];
-    UMA_HISTOGRAM_MEDIUM_TIMES("ServiceWorker.TerminateThread.Time",
-                               base::TimeTicks::Now() - stop_time);
-    stop_worker_times_.erase(embedded_worker_id);
-  }
-  workers_.Remove(embedded_worker_id);
-}
-
-void EmbeddedWorkerDispatcher::RecordStopWorkerTimer(int embedded_worker_id) {
-  WorkerWrapper* wrapper = workers_.Lookup(embedded_worker_id);
-  DCHECK(wrapper);
-  // This should eventually call WorkerContextDestroyed. (We may need to post
-  // a delayed task to forcibly abort the worker context if we find it
-  // necessary)
-  stop_worker_times_[embedded_worker_id] = base::TimeTicks::Now();
-}
-
-}  // namespace content