Update from https://crrev.com/306655

net/disk_cache/simple/simple_entry_impl.cc

Index: net/disk_cache/simple/simple_entry_impl.cc
diff --git a/net/disk_cache/simple/simple_entry_impl.cc b/net/disk_cache/simple/simple_entry_impl.cc
index a6de8782b24c8d6706336a0b3f792b7a800f9b35..a894aff09ca1beef021997ae486074515a7b134a 100644
--- a/net/disk_cache/simple/simple_entry_impl.cc
+++ b/net/disk_cache/simple/simple_entry_impl.cc
@@ -1022,9 +1022,9 @@ void SimpleEntryImpl::WriteSparseDataInternal(
   DCHECK_EQ(STATE_READY, state_);
   state_ = STATE_IO_PENDING;
 
-  int64 max_sparse_data_size = kint64max;
+  uint64 max_sparse_data_size = kint64max;
   if (backend_.get()) {
-    int64 max_cache_size = backend_->index()->max_size();
+    uint64 max_cache_size = backend_->index()->max_size();
     max_sparse_data_size = max_cache_size / kMaxSparseDataSizeDivisor;
   }