1 files changed, 33 insertions, 0 deletions
diff --git a/chromium/chrome/common/initialize_extensions_client.cc b/chromium/chrome/common/initialize_extensions_client.cc
new file mode 100644
index 00000000000..3e9d4cf1f1b
--- /dev/null
+++ b/chromium/chrome/common/initialize_extensions_client.cc
@@ -0,0 +1,33 @@
+// Copyright 2018 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/common/initialize_extensions_client.h"
+
+#include <memory>
+
+#include "base/no_destructor.h"
+#include "chrome/common/apps/platform_apps/chrome_apps_api_provider.h"
+#include "chrome/common/extensions/chrome_extensions_client.h"
+#include "extensions/common/extensions_client.h"
+
+void EnsureExtensionsClientInitialized() {
+  static bool initialized = false;
+
+  static base::NoDestructor<extensions::ChromeExtensionsClient>
+      extensions_client;
+
+  if (!initialized) {
+    initialized = true;
+    extensions_client->AddAPIProvider(
+        std::make_unique<chrome_apps::ChromeAppsAPIProvider>());
+    extensions::ExtensionsClient::Set(extensions_client.get());
+  }
+
+  // ExtensionsClient::Set() will early-out if the client was already set, so
+  // this allows us to check that this was the only site setting it.
+  DCHECK_EQ(extensions_client.get(), extensions::ExtensionsClient::Get())
+      << "ExtensionsClient should only be initialized through "
+      << "EnsureExtensionsClientInitialized() when using "
+      << "ChromeExtensionsClient.";
+}