Worklet: Lazily create PaintWorkletGlobalScopes

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

Index: third_party/WebKit/Source/core/workers/WorkletGlobalScopeManager.cpp
diff --git a/third_party/WebKit/Source/core/workers/WorkletGlobalScopeManager.cpp b/third_party/WebKit/Source/core/workers/WorkletGlobalScopeManager.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..576d4a3a55297e06cb9bd0712018bce0e23e5e63
--- /dev/null
+++ b/third_party/WebKit/Source/core/workers/WorkletGlobalScopeManager.cpp
@@ -0,0 +1,41 @@
+// 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/WorkletGlobalScopeManager.h"
+
+#include "core/workers/WorkletPendingTasks.h"
+
+namespace blink {
+
+void WorkletGlobalScopeManager::AddGlobalScope(
+    std::unique_ptr<WorkletGlobalScopeProxy> proxy) {
+  proxies_.insert(std::move(proxy));
+}
+
+WorkletGlobalScopeProxy* WorkletGlobalScopeManager::FindAvailableGlobalScope()
+    const {
+  DCHECK(IsMainThread());
+  // TODO(nhiroki): Support the case where there are multiple global scopes.
+  DCHECK_EQ(1u, GetNumberOfGlobalScopes());
+  return proxies_.begin()->get();
+}
+
+void WorkletGlobalScopeManager::AddModuleToGlobalScopes(
+    const KURL& module_url_record,
+    WebURLRequest::FetchCredentialsMode credentials_mode,
+    WorkletPendingTasks* pending_tasks) {
+  DCHECK(IsMainThread());
+  for (const auto& proxy : proxies_) {
+    proxy->FetchAndInvokeScript(module_url_record, credentials_mode,
+                                pending_tasks);
+  }
+}
+
+void WorkletGlobalScopeManager::TerminateGlobalScopes() {
+  DCHECK(IsMainThread());
+  for (const auto& proxy : proxies_)
+    proxy->TerminateWorkletGlobalScope();
+}
+
+}  // namespace blink