Handle invalid URLs in share extension.

components/reading_list/ios/reading_list_model_impl.cc

 // Copyright 2016 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.
 
 #include "components/reading_list/ios/reading_list_model_impl.h"
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/memory/ptr_util.h"
 #include "base/strings/string_util.h"
@@ skipping 274 matching lines @@
   entries_->erase(url);
   for (auto& observer : observers_)
     observer.ReadingListDidApplyChanges(this);
 }
 
 const ReadingListEntry& ReadingListModelImpl::AddEntry(
     const GURL& url,
     const std::string& title) {
   DCHECK(CalledOnValidThread());
   DCHECK(loaded());
+  DCHECK(url.SchemeIsHTTPOrHTTPS());
   RemoveEntryByURL(url);
 
   std::string trimmedTitle(title);
   base::TrimWhitespaceASCII(trimmedTitle, base::TRIM_ALL, &trimmedTitle);
 
   ReadingListEntry entry(url, trimmedTitle);
   for (auto& observer : observers_)
     observer.ReadingListWillAddEntry(this, entry);
   has_unseen_ = true;
   SetPersistentHasUnseen(true);
@@ skipping 171 matching lines @@
 syncer::ModelTypeSyncBridge* ReadingListModelImpl::GetModelTypeSyncBridge() {
   DCHECK(loaded());
   if (!storage_layer_)
     return nullptr;
   return storage_layer_.get();
 }
 
 ReadingListModelStorage* ReadingListModelImpl::StorageLayer() {
   return storage_layer_.get();
 }