Disk Cache: Add more corruption tracking histograms.

net/disk_cache/addr.cc

-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// 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 "net/disk_cache/addr.h"
 
 #include "base/logging.h"
 
 namespace disk_cache {
 
 int Addr::start_block() const {
@@ skipping 21 matching lines @@
   if (((value_ & kFileTypeMask) >> kFileTypeOffset) > 4)
     return false;
 
   if (is_separate_file())
     return true;
 
   const uint32 kReservedBitsMask = 0x0c000000;
   return !(value_ & kReservedBitsMask);
 }
 
+bool Addr::SanityCheckForEntry() const {
+  if (!SanityCheck() || !is_initialized())
+    return false;
+
+  if (is_separate_file() || file_type() != BLOCK_256)
+    return false;
+
+  return true;
+}
+
+bool Addr::SanityCheckForRankings() const {
+  if (!SanityCheck() || !is_initialized())
+    return false;
+
+  if (is_separate_file() || file_type() != RANKINGS || num_blocks() != 1)
+    return false;
+
+  return true;
+}
+
 }  // namespace disk_cache