Remove multi-install from chrome/installer/setup.

chrome/installer/setup/install.h

Index: chrome/installer/setup/install.h
diff --git a/chrome/installer/setup/install.h b/chrome/installer/setup/install.h
index b648f1aa36601ef1f8397e7fd199160858669c69..20ebd55d91f49121dc0f49be627169532d890d06 100644
--- a/chrome/installer/setup/install.h
+++ b/chrome/installer/setup/install.h
@@ -7,14 +7,7 @@
 #ifndef CHROME_INSTALLER_SETUP_INSTALL_H_
 #define CHROME_INSTALLER_SETUP_INSTALL_H_
 
-#include <vector>
-
 #include "base/strings/string16.h"
-#include "base/version.h"
-#include "chrome/installer/setup/installer_state.h"
-#include "chrome/installer/util/installation_state.h"
-#include "chrome/installer/util/master_preferences.h"
-#include "chrome/installer/util/product.h"
 #include "chrome/installer/util/util_constants.h"
 
 namespace base {
@@ -27,6 +20,7 @@ namespace installer {
 class InstallationState;
 class InstallerState;
 class MasterPreferences;
+class Product;
 
 enum InstallShortcutOperation {
   // Create all shortcuts (potentially skipping those explicitly stated not to