Revert of Remove installation of Chrome Frame.

chrome/installer/util/master_preferences.h

Index: chrome/installer/util/master_preferences.h
diff --git a/chrome/installer/util/master_preferences.h b/chrome/installer/util/master_preferences.h
index 1b27c7e6958009d8fb6a79362703bdb443daecff..6b5c9c3ec962d8c32ff1d23d0f6875817ecf7b0e 100644
--- a/chrome/installer/util/master_preferences.h
+++ b/chrome/installer/util/master_preferences.h
@@ -172,6 +172,10 @@
     return chrome_app_launcher_;
   }
 
+  bool install_chrome_frame() const {
+    return chrome_frame_;
+  }
+
   bool is_multi_install() const {
     return multi_install_;
   }
@@ -206,6 +210,7 @@
   bool preferences_read_from_file_;
   bool chrome_;
   bool chrome_app_launcher_;
+  bool chrome_frame_;
   bool multi_install_;
 
  private: