Implement installation of the Chrome App Host.

chrome/installer/util/installation_state.cc

Index: chrome/installer/util/installation_state.cc
diff --git a/chrome/installer/util/installation_state.cc b/chrome/installer/util/installation_state.cc
index ab099246c8276e68a75333c3fca6a3ecb7861a29..0e37e091e154fc1f0491955f06e314e01faabaa4 100644
--- a/chrome/installer/util/installation_state.cc
+++ b/chrome/installer/util/installation_state.cc
@@ -1,4 +1,4 @@
-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// 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.
 
@@ -223,9 +223,12 @@ int InstallationState::IndexFromDistType(BrowserDistribution::Type type) {
                  unexpected_chrome_frame_distribution_value_);
   COMPILE_ASSERT(BrowserDistribution::CHROME_BINARIES == CHROME_BINARIES_INDEX,
                  unexpected_chrome_frame_distribution_value_);
+  COMPILE_ASSERT(BrowserDistribution::CHROME_APP_HOST == CHROME_APP_HOST_INDEX,
+                 unexpected_chrome_frame_distribution_value_);
   DCHECK(type == BrowserDistribution::CHROME_BROWSER ||
          type == BrowserDistribution::CHROME_FRAME ||
-         type == BrowserDistribution::CHROME_BINARIES);
+         type == BrowserDistribution::CHROME_BINARIES ||
+         type == BrowserDistribution::CHROME_APP_HOST);
   return type;
 }
 
@@ -246,6 +249,11 @@ void InstallationState::Initialize() {
       BrowserDistribution::CHROME_BINARIES);
   user_products_[CHROME_BINARIES_INDEX].Initialize(false, distribution);
   system_products_[CHROME_BINARIES_INDEX].Initialize(true, distribution);
+
+  distribution = BrowserDistribution::GetSpecificDistribution(
+      BrowserDistribution::CHROME_APP_HOST);
+  user_products_[CHROME_APP_HOST_INDEX].Initialize(false, distribution);
+  system_products_[CHROME_APP_HOST_INDEX].Initialize(true, distribution);
 }
 
 const ProductState* InstallationState::GetNonVersionedProductState(