Check multi-crx path for force update based on manifest entries

extensions/common/manifest_constants.cc

Index: extensions/common/manifest_constants.cc
diff --git a/extensions/common/manifest_constants.cc b/extensions/common/manifest_constants.cc
index 837bc9f33dde79b5a0a3e69799746d4d3fe228bd..acb9a9ea3704d920b9d69bbf427ad65b031f03e8 100644
--- a/extensions/common/manifest_constants.cc
+++ b/extensions/common/manifest_constants.cc
@@ -83,6 +83,7 @@ const char kMinimumVersion[] = "minimum_version";
 const char kMIMETypes[] = "mime_types";
 const char kMimeTypesHandler[] = "mime_types_handler";
 const char kName[] = "name";
+const char kNaClArch[] = "nacl_arch";
 const char kNaClModules[] = "nacl_modules";
 const char kNaClModulesMIMEType[] = "mime_type";
 const char kNaClModulesPath[] = "path";
@@ -114,6 +115,7 @@ const char kPlatformAppBackground[] = "app.background";
 const char kPlatformAppBackgroundPage[] = "app.background.page";
 const char kPlatformAppBackgroundScripts[] = "app.background.scripts";
 const char kPlatformAppContentSecurityPolicy[] = "app.content_security_policy";
+const char kPlatforms[] = "platforms";
 const char kPlugins[] = "plugins";
 const char kPluginsPath[] = "path";
 const char kPluginsPublic[] = "public";
@@ -139,6 +141,7 @@ const char kSpellcheckDictionaryLanguage[] = "dictionary_language";
 const char kSpellcheckDictionaryLocale[] = "dictionary_locale";
 const char kSpellcheckDictionaryPath[] = "dictionary_path";
 const char kStorageManagedSchema[] = "storage.managed_schema";
+const char kSubPackagePath[] = "sub_package_path";
 const char kSuggestedKey[] = "suggested_key";
 const char kSynthesizeBrowserAction[] = "_synthesize_browser_action";
 const char kSystemIndicator[] = "system_indicator";