Add PNACL_CACHE cache backend type, and allow larger files for this type.

net/disk_cache/backend_impl.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 "net/disk_cache/backend_impl.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/file_util.h"
 #include "base/files/file_path.h"
@@ skipping 849 matching lines @@
   }
 
   return NULL;
 }
 
 int32 BackendImpl::GetCurrentEntryId() const {
   return data_->header.this_id;
 }
 
 int BackendImpl::MaxFileSize() const {
-  return max_size_ / 8;
+  return cache_type() == net::PNACL_CACHE ? max_size_ : max_size_ / 8;
 }
 
 void BackendImpl::ModifyStorageSize(int32 old_size, int32 new_size) {
   if (disabled_ || old_size == new_size)
     return;
   if (old_size > new_size)
     SubstractStorageSize(old_size - new_size);
   else
     AddStorageSize(new_size - old_size);
 
@@ skipping 1228 matching lines @@
     if (total_memory > kMaxBuffersSize || total_memory <= 0)
       total_memory = kMaxBuffersSize;
 
     done = true;
   }
 
   return static_cast<int>(total_memory);
 }
 
 }  // namespace disk_cache