Increase HPACK table size up to the optimal size if clients allow it.

net/spdy/hpack/hpack_header_table.cc

 // Copyright 2014 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/spdy/hpack/hpack_header_table.h"
 
 #include <algorithm>
 
 #include "base/logging.h"
 #include "net/spdy/hpack/hpack_constants.h"
 #include "net/spdy/hpack/hpack_static_table.h"
+#include "net/spdy/spdy_flags.h"
 
 namespace net {
 
 using base::StringPiece;
 
 size_t HpackHeaderTable::EntryHasher::operator()(
     const HpackEntry* entry) const {
   return base::StringPieceHash()(entry->name()) ^
          base::StringPieceHash()(entry->value());
 }
@@ skipping 96 matching lines @@
 
   max_size_ = max_size;
   if (size_ > max_size_) {
     Evict(EvictionCountToReclaim(size_ - max_size_));
     CHECK_LE(size_, max_size_);
   }
 }
 
 void HpackHeaderTable::SetSettingsHeaderTableSize(size_t settings_size) {
   settings_size_bound_ = settings_size;
-  if (settings_size_bound_ < max_size_) {
+  if (!FLAGS_chromium_reloadable_flag_increase_hpack_table_size) {
+    if (settings_size_bound_ < max_size_) {
+      SetMaxSize(settings_size_bound_);
+    }
+  } else {
     SetMaxSize(settings_size_bound_);
   }
 }
 
 void HpackHeaderTable::EvictionSet(StringPiece name,
                                    StringPiece value,
                                    EntryTable::iterator* begin_out,
                                    EntryTable::iterator* end_out) {
   size_t eviction_count = EvictionCountForEntry(name, value);
   *begin_out = dynamic_entries_.end() - eviction_count;
@@ skipping 120 matching lines @@
   for (auto* entry : dynamic_index_) {
     DVLOG(2) << "  " << entry->GetDebugString();
   }
   DVLOG(2) << "Full Dynamic Name Index:";
   for (const auto it : dynamic_name_index_) {
     DVLOG(2) << "  " << it.first << ": " << it.second->GetDebugString();
   }
 }
 
 }  // namespace net