[Payments] Cache payment manifests.

components/payments/android/web_app_manifest_section_table.h

 // Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef COMPONENTS_PAYMENTS_ANDROID_WEB_APP_MANIFEST_SECTION_TABLE_H_
 #define COMPONENTS_PAYMENTS_ANDROID_WEB_APP_MANIFEST_SECTION_TABLE_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 22 matching lines @@
 
   // Retrieves the WebAppManifestSectionTable* owned by |db|.
   static WebAppManifestSectionTable* FromWebDatabase(WebDatabase* db);
 
   // WebDatabaseTable:
   WebDatabaseTable::TypeKey GetTypeKey() const override;
   bool CreateTablesIfNecessary() override;
   bool IsSyncable() override;
   bool MigrateToVersion(int version, bool* update_compatible_version) override;
 
-  // Adds the web app |*manifest|. Note that the previous web app manifest will
+  // Adds the web app |manifest|. Note that the previous web app manifest will
   // be deleted.
-  bool AddWebAppManifest(mojom::WebAppManifestSection* manifest);
+  bool AddWebAppManifest(
+      const std::vector<mojom::WebAppManifestSectionPtr>& manifest);
 
-  // Gets manifest of the |web_app|. Returns nullptr if no manifest exists for
-  // the |web_app|.
-  mojom::WebAppManifestSectionPtr GetWebAppManifest(const std::string& web_app);
+  // Gets manifest of the |web_app|. Returns empty vector if no manifest exists
+  // for the |web_app|.
+  std::vector<mojom::WebAppManifestSectionPtr> GetWebAppManifest(
+      const std::string& web_app);
 
  private:
   DISALLOW_COPY_AND_ASSIGN(WebAppManifestSectionTable);
 };
 
 }  // namespace payments
 
 #endif  // COMPONENTS_PAYMENTS_ANDROID_WEB_APP_MANIFEST_SECTION_TABLE_H_