Add recommended extension installation support

chrome/browser/extensions/extension_management.h

Index: chrome/browser/extensions/extension_management.h
diff --git a/chrome/browser/extensions/extension_management.h b/chrome/browser/extensions/extension_management.h
index 5c443548bde8e803b69761ee46b573d3bdc6e735..e093d0c84901f4e0ab0c75022e603b662bc6584e 100644
--- a/chrome/browser/extensions/extension_management.h
+++ b/chrome/browser/extensions/extension_management.h
@@ -109,12 +109,16 @@ class ExtensionManagement : public KeyedService {
   // Checks if extensions are blacklisted by default, by policy. When true,
   // this means that even extensions without an ID should be blacklisted (e.g.
   // from the command line, or when loaded as an unpacked extension).
-  bool BlacklistedByDefault();
+  bool BlacklistedByDefault() const;
 
   // Returns the force install list, in format specified by
   // ExternalPolicyLoader::AddExtension().
   scoped_ptr<base::DictionaryValue> GetForceInstallList() const;
 
+  // Like GetRecommendedInstallList(), but returns recommended install list
+  // instead.
+  scoped_ptr<base::DictionaryValue> GetRecommendedInstallList() const;
+
   // Returns if an extension with id |id| is allowed to install or not.
   bool IsInstallationAllowed(const ExtensionId& id) const;