Upon execution of the App Host, ask Omaha to install the Chrome Binaries if they are not present on…

chrome/browser/extensions/app_host/binaries_installer_internal.h

+// Copyright (c) 2012 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.
+
+#ifndef CHROME_BROWSER_EXTENSIONS_APP_HOST_BINARIES_INSTALLER_INTERNAL_H_
+#define CHROME_BROWSER_EXTENSIONS_APP_HOST_BINARIES_INSTALLER_INTERNAL_H_
+
+#include <windows.h>
+#include <oleauto.h>
+
+struct IApp;
+struct IAppBundle;
+struct IGoogleUpdate3;
+
+namespace app_host {
+namespace internal {
+
+// Returns true if the installation process is terminated, in which case *hr
+// will reveal the outcome.
+bool CheckIfDone(IAppBundle* app_bundle, IApp* app, HRESULT* hr);
+
+// Creates and initializes an IAppBundle using the provided IGoogleUpdate3
+// instance.
+HRESULT CreateAppBundle(IGoogleUpdate3* update3, IAppBundle** app_bundle);
+
+// Retrieves the AP value of the Application Host, if installed.
+HRESULT GetAppHostApValue(IGoogleUpdate3* update3, BSTR* ap_value);
+
+// Adds the Chrome Binaries to the bundle for installation.
+HRESULT CreateBinariesIApp(IAppBundle* app_bundle, BSTR ap, IApp** app);
+
+// Create an instance of the IGoogleUpdate3 interface.
+HRESULT CreateGoogleUpdate3(IGoogleUpdate3** update3);
+
+// Attempts to use the AP value from the installed App Host, defaulting to Dev
+// channel otherwise.
+HRESULT SelectBinariesApValue(IGoogleUpdate3* update3, BSTR* ap_value);
+
+}  // namespace internal
+}  // namespace app_host
+
+#endif  // CHROME_BROWSER_EXTENSIONS_APP_HOST_BINARIES_INSTALLER_INTERNAL_H_