Move brand- and mode-specific app icon resource id into InstallConstants.

chrome/install_static/install_constants.h

Index: chrome/install_static/install_constants.h
diff --git a/chrome/install_static/install_constants.h b/chrome/install_static/install_constants.h
index 4d9564d6f70f93b08167cbeb6cd379132258d839..802bf0c50591a725e20e5cddd32613580dc8150b 100644
--- a/chrome/install_static/install_constants.h
+++ b/chrome/install_static/install_constants.h
@@ -9,6 +9,8 @@
 #ifndef CHROME_INSTALL_STATIC_INSTALL_CONSTANTS_H_
 #define CHROME_INSTALL_STATIC_INSTALL_CONSTANTS_H_
 
+#include <stdint.h>
+
 namespace install_static {
 
 // Identifies different strategies for determining an update channel.
@@ -69,6 +71,9 @@ struct InstallConstants {
 
   // True if this mode supported the now-deprecated multi-install.
   bool supported_multi_install;
+
+  // The resource id of this mode's main application icon.
+  int16_t app_icon_resource_id;
 };
 
 }  // namespace install_static