Safebrowsing: change gethash caching to match api 2.3 rules, fix some corner cases.

chrome/browser/safe_browsing/safe_browsing_util.cc

 // Copyright (c) 2012 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 "chrome/browser/safe_browsing/safe_browsing_util.h"
 
 #include "base/logging.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "chrome/browser/google/google_util.h"
@@ skipping 39 matching lines @@
          hiter != citer->hosts.end(); ++hiter) {
       if (hiter->entry) {
         hiter->entry->Destroy();
         hiter->entry = NULL;
       }
     }
   }
   chunks_.clear();
 }
 
+// SBCachedFullHashResult ------------------------------------------------------
+
+SBCachedFullHashResult::SBCachedFullHashResult() {}
+
+SBCachedFullHashResult::SBCachedFullHashResult(
+    const base::Time& in_expire_after)
+    : expire_after(in_expire_after) {}
+
+SBCachedFullHashResult::~SBCachedFullHashResult() {}
+
 // SBListChunkRanges -----------------------------------------------------------
 
 SBListChunkRanges::SBListChunkRanges(const std::string& n) : name(n) {}
 
 // SBChunkDelete ---------------------------------------------------------------
 
 SBChunkDelete::SBChunkDelete() : is_sub_del(false) {}
 
 SBChunkDelete::~SBChunkDelete() {}
 
@@ skipping 467 matching lines @@
   memcpy(hash_out.full_hash, hash_in.data(), crypto::kSHA256Length);
   return hash_out;
 }
 
 std::string SBFullHashToString(const SBFullHash& hash) {
   DCHECK_EQ(crypto::kSHA256Length, sizeof(hash.full_hash));
   return std::string(hash.full_hash, sizeof(hash.full_hash));
 }
 
 }  // namespace safe_browsing_util