Add generateAppForLink function in chrome.management

chrome/browser/extensions/api/management/management_api_constants.cc

Index: chrome/browser/extensions/api/management/management_api_constants.cc
===================================================================
--- chrome/browser/extensions/api/management/management_api_constants.cc	(revision 271412)
+++ chrome/browser/extensions/api/management/management_api_constants.cc	(working copy)
@@ -33,5 +33,13 @@
     "Shortcuts can only be created for new-style packaged apps on Mac.";
 const char kCreateShortcutCanceledError[] =
     "App shortcuts creation canceled by user.";
+const char kGestureNeededForGenerateAppForLinkError[] =
+    "chrome.management.generateAppForLink requires a user gesture.";
+const char kNoFaviconServiceToGenerateAppForLink[] =
+    "There is no favicon service to generate app for link.";
+const char kInvalidURLError[] = "The URL \"*\" is invalid.";
+const char kEmptyTitleError[] = "The title can not be empty.";
+const char kGenerateAppForLinkInstallError[] =
+    "Failed to install the generated app.";
 
 }  // namespace extension_management_api_constants