Remove WebContents::HasManifest.

content/renderer/manifest/manifest_manager.h

 // Copyright 2014 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 CONTENT_RENDERER_MANIFEST_MANIFEST_MANAGER_H_
 #define CONTENT_RENDERER_MANIFEST_MANIFEST_MANAGER_H_
 
 #include <list>
 #include <memory>
 
@@ skipping 42 matching lines @@
   enum ResolveState {
     ResolveStateSuccess,
     ResolveStateFailure
   };
 
   // RenderFrameObserver implementation.
   void OnDestruct() override;
 
   // Called when receiving a ManifestManagerMsg_RequestManifest from the browser
   // process.
-  void OnHasManifest(int request_id);
   void OnRequestManifest(int request_id);
   void OnRequestManifestComplete(int request_id,
                                  const GURL&,
                                  const Manifest&,
                                  const ManifestDebugInfo&);
 
   void FetchManifest();
   void OnManifestFetchComplete(const GURL& document_url,
                                const blink::WebURLResponse& response,
                                const std::string& data);
@@ skipping 20 matching lines @@
   ManifestDebugInfo manifest_debug_info_;
 
   std::list<GetManifestCallback> pending_callbacks_;
 
   DISALLOW_COPY_AND_ASSIGN(ManifestManager);
 };
 
 } // namespace content
 
 #endif  // CONTENT_RENDERER_MANIFEST_MANIFEST_MANAGER_H_