[WIP] Worklet: Merge MainThreadWorklet and ThreadedWorklet into Worklet

third_party/WebKit/Source/core/workers/MainThreadWorklet.cpp

Index: third_party/WebKit/Source/core/workers/MainThreadWorklet.cpp
diff --git a/third_party/WebKit/Source/core/workers/MainThreadWorklet.cpp b/third_party/WebKit/Source/core/workers/MainThreadWorklet.cpp
deleted file mode 100644
index cdec996017a1b9aa6719e9760e4f224861e8a174..0000000000000000000000000000000000000000
--- a/third_party/WebKit/Source/core/workers/MainThreadWorklet.cpp
+++ /dev/null
@@ -1,108 +0,0 @@
-// Copyright 2017 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 "core/workers/MainThreadWorklet.h"
-
-#include "bindings/core/v8/ScriptPromiseResolver.h"
-#include "bindings/core/v8/ScriptSourceCode.h"
-#include "bindings/core/v8/V8BindingForCore.h"
-#include "core/frame/LocalFrame.h"
-#include "core/workers/WorkletGlobalScopeProxy.h"
-#include "core/workers/WorkletPendingTasks.h"
-#include "platform/wtf/WTF.h"
-#include "public/platform/WebURLRequest.h"
-
-namespace blink {
-
-namespace {
-
-WebURLRequest::FetchCredentialsMode ParseCredentialsOption(
-    const String& credentials_option) {
-  if (credentials_option == "omit")
-    return WebURLRequest::kFetchCredentialsModeOmit;
-  if (credentials_option == "same-origin")
-    return WebURLRequest::kFetchCredentialsModeSameOrigin;
-  if (credentials_option == "include")
-    return WebURLRequest::kFetchCredentialsModeInclude;
-  NOTREACHED();
-  return WebURLRequest::kFetchCredentialsModeOmit;
-}
-
-}  // namespace
-
-MainThreadWorklet::MainThreadWorklet(LocalFrame* frame) : Worklet(frame) {}
-
-WorkletGlobalScopeProxy* MainThreadWorklet::FindAvailableGlobalScope() const {
-  DCHECK(IsMainThread());
-  // TODO(nhiroki): Support the case where there are multiple global scopes.
-  DCHECK_EQ(1u, GetNumberOfGlobalScopes());
-  return proxies_.begin()->get();
-}
-
-// Implementation of the second half of the "addModule(moduleURL, options)"
-// algorithm:
-// https://drafts.css-houdini.org/worklets/#dom-worklet-addmodule
-void MainThreadWorklet::FetchAndInvokeScript(const KURL& module_url_record,
-                                             const WorkletOptions& options,
-                                             ScriptPromiseResolver* resolver) {
-  DCHECK(IsMainThread());
-  if (!GetExecutionContext())
-    return;
-
-  // Step 6: "Let credentialOptions be the credentials member of options."
-  // TODO(nhiroki): Add tests for credentialOptions (https://crbug.com/710837).
-  WebURLRequest::FetchCredentialsMode credentials_mode =
-      ParseCredentialsOption(options.credentials());
-
-  // Step 7: "Let outsideSettings be the relevant settings object of this."
-  // TODO(nhiroki): outsideSettings will be used for posting a task to the
-  // document's responsible event loop. We could use a task runner for the
-  // purpose.
-
-  // Step 8: "Let moduleResponsesMap be worklet's module responses map."
-  // TODO(nhiroki): Implement moduleResponsesMap (https://crbug.com/627945).
-
-  // Step 9: "Let workletGlobalScopeType be worklet's worklet global scope
-  // type."
-  // workletGlobalScopeType is encoded into the class name (e.g., PaintWorklet).
-
-  // Step 10: "If the worklet's WorkletGlobalScopes is empty, run the following
-  // steps:"
-  //   10.1: "Create a WorkletGlobalScope given workletGlobalScopeType,
-  //          moduleResponsesMap, and outsideSettings."
-  //   10.2: "Add the WorkletGlobalScope to worklet's WorkletGlobalScopes."
-  // "Depending on the type of worklet the user agent may create additional
-  // WorkletGlobalScopes at this time."
-  while (NeedsToCreateGlobalScope())
-    proxies_.insert(CreateGlobalScope());
-  DCHECK_EQ(1u, GetNumberOfGlobalScopes());
-
-  // Step 11: "Let pendingTaskStruct be a new pending tasks struct with counter
-  // initialized to the length of worklet's WorkletGlobalScopes."
-  WorkletPendingTasks* pending_tasks =
-      new WorkletPendingTasks(GetNumberOfGlobalScopes(), resolver);
-
-  // Step 12: "For each workletGlobalScope in the worklet's
-  // WorkletGlobalScopes, queue a task on the workletGlobalScope to fetch and
-  // invoke a worklet script given workletGlobalScope, moduleURLRecord,
-  // moduleResponsesMap, credentialOptions, outsideSettings, pendingTaskStruct,
-  // and promise."
-  // TODO(nhiroki): Queue a task instead of executing this here.
-  for (const auto& proxy : proxies_) {
-    proxy->FetchAndInvokeScript(module_url_record, credentials_mode,
-                                pending_tasks);
-  }
-}
-
-void MainThreadWorklet::ContextDestroyed(ExecutionContext* execution_context) {
-  DCHECK(IsMainThread());
-  for (const auto& proxy : proxies_)
-    proxy->TerminateWorkletGlobalScope();
-}
-
-DEFINE_TRACE(MainThreadWorklet) {
-  Worklet::Trace(visitor);
-}
-
-}  // namespace blink