Query API: Introduces an OfflinePageModelQuery object.

components/offline_pages/client_policy_controller.h

Index: components/offline_pages/client_policy_controller.h
diff --git a/components/offline_pages/client_policy_controller.h b/components/offline_pages/client_policy_controller.h
index 2d89cc923d5a36555eaba0c2f1108abcbee19e2b..6581e407ad5ec935743d7380afc266990c53fe44 100644
--- a/components/offline_pages/client_policy_controller.h
+++ b/components/offline_pages/client_policy_controller.h
@@ -35,6 +35,10 @@ class ClientPolicyController {
   // Get the client policy for |name_space|.
   const OfflinePageClientPolicy& GetPolicy(const std::string& name_space) const;
 
+  // Returns a list of all namespaces that are not in the list of exceptions.
+  std::vector<std::string> GetAllNamespacesExcept(

[Dmitry Titov, 2016/10/20 19:40:53]

It's a weird method to have here... Why not "GetAllNamespaces"?

[dewittj, 2016/10/21 17:49:46]

Can do.

+      const std::vector<std::string>& exceptions) const;
+
   // Returns whether pages for |name_space| should be removed on cache reset.
   bool IsRemovedOnCacheReset(const std::string& name_space) const;