Convert SafeBrowsingStoreFile to do bulk reads and writes.

chrome/browser/safe_browsing/safe_browsing_store.h

 // Copyright (c) 2010 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 CHROME_BROWSER_SAFE_BROWSING_SAFE_BROWSING_STORE_H_
 #define CHROME_BROWSER_SAFE_BROWSING_SAFE_BROWSING_STORE_H_
 
 #include <set>
 #include <vector>
 
@@ skipping 25 matching lines @@
 
 // GetAddChunkId(), GetAddPrefix() and GetFullHash() are exposed so
 // that these items can be generically compared with each other by
 // SBAddPrefixLess() and SBAddPrefixHashLess().
 
 struct SBAddPrefix {
   int32 chunk_id;
   SBPrefix prefix;
 
   SBAddPrefix(int32 id, SBPrefix p) : chunk_id(id), prefix(p) {}
+  SBAddPrefix() : chunk_id(), prefix() {}
 
   int32 GetAddChunkId() const { return chunk_id; }
   SBPrefix GetAddPrefix() const { return prefix; }
 };
 
 struct SBSubPrefix {
   int32 chunk_id;
   int32 add_chunk_id;
   SBPrefix add_prefix;
 
   SBSubPrefix(int32 id, int32 add_id, int prefix)
       : chunk_id(id), add_chunk_id(add_id), add_prefix(prefix) {}
+  SBSubPrefix() : chunk_id(), add_chunk_id(), add_prefix() {}
 
   int32 GetAddChunkId() const { return add_chunk_id; }
   SBPrefix GetAddPrefix() const { return add_prefix; }
 };
 
 struct SBAddFullHash {
   int32 chunk_id;
   int32 received;
   SBFullHash full_hash;
 
   SBAddFullHash(int32 id, base::Time r, SBFullHash h)
       : chunk_id(id),
         received(static_cast<int32>(r.ToTimeT())),
         full_hash(h) {
   }
 
   // Provided for ReadAddHashes() implementations, which already have
   // an int32 for the time.
   SBAddFullHash(int32 id, int32 r, SBFullHash h)
       : chunk_id(id), received(r), full_hash(h) {}
 
+  SBAddFullHash() : chunk_id(), received(), full_hash() {}
+
   int32 GetAddChunkId() const { return chunk_id; }
   SBPrefix GetAddPrefix() const { return full_hash.prefix; }
 };
 
 struct SBSubFullHash {
   int32 chunk_id;
   int32 add_chunk_id;
   SBFullHash full_hash;
 
   SBSubFullHash(int32 id, int32 add_id, SBFullHash h)
       : chunk_id(id), add_chunk_id(add_id), full_hash(h) {}
+  SBSubFullHash() : chunk_id(), add_chunk_id(), full_hash() {}
 
   int32 GetAddChunkId() const { return add_chunk_id; }
   SBPrefix GetAddPrefix() const { return full_hash.prefix; }
 };
 
 // Determine less-than based on add chunk and prefix.
 template <class T, class U>
 bool SBAddPrefixLess(const T& a, const U& b) {
   if (a.GetAddChunkId() != b.GetAddChunkId())
     return a.GetAddChunkId() < b.GetAddChunkId();
@@ skipping 109 matching lines @@
 
   // Cancel the update in process and remove any temporary disk
   // storage, leaving the original data unmodified.
   virtual bool CancelUpdate() = 0;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(SafeBrowsingStore);
 };
 
 #endif  // CHROME_BROWSER_SAFE_BROWSING_SAFE_BROWSING_STORE_H_