Misc truncation fixes for gn builds with VS 2015

content/browser/indexed_db/indexed_db_leveldb_coding.cc

 // Copyright (c) 2013 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 "content/browser/indexed_db/indexed_db_leveldb_coding.h"
 
 #include <iterator>
 #include <limits>
 
 #include "base/logging.h"
@@ skipping 1233 matching lines @@
   std::string index_id_string;
 
   EncodeIntSafely(database_id, kMaxDatabaseId, &database_id_string);
   EncodeIntSafely(object_store_id, kMaxObjectStoreId, &object_store_id_string);
   EncodeIntSafely(index_id, kMaxIndexId, &index_id_string);
 
   DCHECK(database_id_string.size() <= kMaxDatabaseIdSizeBytes);
   DCHECK(object_store_id_string.size() <= kMaxObjectStoreIdSizeBytes);
   DCHECK(index_id_string.size() <= kMaxIndexIdSizeBytes);
 
-  unsigned char first_byte =
+  unsigned char first_byte = static_cast<char>(
       (database_id_string.size() - 1) << (kMaxObjectStoreIdSizeBits +
                                           kMaxIndexIdSizeBits) |
       (object_store_id_string.size() - 1) << kMaxIndexIdSizeBits |
-      (index_id_string.size() - 1);
+      (index_id_string.size() - 1));
   static_assert(kMaxDatabaseIdSizeBits + kMaxObjectStoreIdSizeBits +
                         kMaxIndexIdSizeBits ==
                     sizeof(first_byte) * 8,
                 "cannot encode ids");
   std::string ret;
   ret.reserve(kDefaultInlineBufferSize);
   ret.push_back(first_byte);
   ret.append(database_id_string);
   ret.append(object_store_id_string);
   ret.append(index_id_string);
@@ skipping 763 matching lines @@
 scoped_ptr<IndexedDBKey> IndexDataKey::primary_key() const {
   scoped_ptr<IndexedDBKey> key;
   StringPiece slice(encoded_primary_key_);
   if (!DecodeIDBKey(&slice, &key)) {
     // TODO(jsbell): Return error.
   }
   return key.Pass();
 }
 
 }  // namespace content