Chrome-side patch for IsAppInstalled.

content/common/installedapp/installed_app_provider_impl_default.cc

+// Copyright 2016 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/common/installedapp/installed_app_provider_impl.h"
+
+#include "base/strings/utf_string_conversions.h"
+#include "content/common/installedapp/related_application.mojom.h"
+#include "mojo/public/cpp/bindings/array.h"
+#include "mojo/public/cpp/bindings/strong_binding.h"
+
+namespace content {
+
+namespace {
+
+class InstalledAppProviderEmptyImpl : public InstalledAppProvider {
+ public:
+  void FilterInstalledApps(
+      mojo::Array<RelatedApplicationPtr> apps,
+      const mojo::String& origin,
+      const FilterInstalledAppsCallback& callback) override {
+    callback.Run(mojo::Array<content::RelatedApplicationPtr>());
+  };
+
+ private:
+  friend InstalledAppProviderImpl;
+
+  InstalledAppProviderEmptyImpl(
+      mojo::InterfaceRequest<InstalledAppProvider> request)
+      : binding_(this, std::move(request)) {}
+  ~InstalledAppProviderEmptyImpl() override {}
+
+  // The binding between this object and the other end of the pipe.
+  mojo::StrongBinding<InstalledAppProvider> binding_;
+};
+
+}  // namespace
+
+// static
+void InstalledAppProviderImpl::Create(
+    mojo::InterfaceRequest<InstalledAppProvider> request) {
+  new InstalledAppProviderEmptyImpl(std::move(request));
+}
+}  // namespace content