[Mac] Rebuild app shims when they fail to dyload Chrome Framework.

chrome/browser/web_applications/web_app_mac.h

Index: chrome/browser/web_applications/web_app_mac.h
diff --git a/chrome/browser/web_applications/web_app_mac.h b/chrome/browser/web_applications/web_app_mac.h
index a0a8b2060ddb3a999495de14be46b37b7ceef6c3..7c2ff41676a066303c52b8f4fd74904a9396c338 100644
--- a/chrome/browser/web_applications/web_app_mac.h
+++ b/chrome/browser/web_applications/web_app_mac.h
@@ -14,6 +14,10 @@
 #include "chrome/browser/web_applications/web_app.h"
 #include "extensions/common/manifest_handlers/file_handler_info.h"
 
+namespace base {
+class CommandLine;
+}
+
 // Whether to enable update and launch of app shims in tests. (Normally shims
 // are never created or launched in tests). Note that update only creates
 // internal shim bundles, i.e. it does not create new shims in ~/Applications.
@@ -28,6 +32,9 @@ base::FilePath GetAppInstallPath(const ShortcutInfo& shortcut_info);
 // If necessary, launch the shortcut for an app.
 void MaybeLaunchShortcut(const ShortcutInfo& shortcut_info);
 
+// Rebuild the shortcut and relaunch it.
+bool MaybeRebuildShortcut(const base::CommandLine& command_line);
+
 // Creates a shortcut for a web application. The shortcut is a stub app
 // that simply loads the browser framework and runs the given app.
 class WebAppShortcutCreator {