Unify the QUIC dispatcher and make the QuicServer work.

net/BUILD.gn

Index: net/BUILD.gn
diff --git a/net/BUILD.gn b/net/BUILD.gn
index 165c1de6f322a0ee6f649ddfb0ada48228d9f2aa..8b6527f26b4509a0da3d0ae15022a97ce41d2a3c 100644
--- a/net/BUILD.gn
+++ b/net/BUILD.gn
@@ -1147,8 +1147,6 @@ if (is_linux) {
       "tools/quic/quic_client_session.h",
       "tools/quic/quic_default_packet_writer.cc",
       "tools/quic/quic_default_packet_writer.h",
-      "tools/quic/quic_dispatcher.cc",
-      "tools/quic/quic_dispatcher.h",
       "tools/quic/quic_epoll_clock.cc",
       "tools/quic/quic_epoll_clock.h",
       "tools/quic/quic_epoll_connection_helper.cc",
@@ -1157,8 +1155,6 @@ if (is_linux) {
       "tools/quic/quic_packet_reader.h",
       "tools/quic/quic_packet_writer_wrapper.cc",
       "tools/quic/quic_packet_writer_wrapper.h",
-      "tools/quic/quic_per_connection_packet_writer.cc",
-      "tools/quic/quic_per_connection_packet_writer.h",
       "tools/quic/quic_server.cc",
       "tools/quic/quic_server.h",
       "tools/quic/quic_socket_utils.cc",
@@ -1233,8 +1229,6 @@ if (is_android || is_linux) {
 # such as when all dependees are not buildable for the chosen OS.
 source_set("quic_tools") {
   sources = [
-    "quic/quic_dispatcher.cc",
-    "quic/quic_dispatcher.h",
     "quic/quic_per_connection_packet_writer.cc",
     "quic/quic_per_connection_packet_writer.h",
     "quic/quic_server.cc",
@@ -1251,8 +1245,12 @@ source_set("quic_tools") {
 }
 source_set("simple_quic_tools") {
   sources = [
+    "tools/quic/quic_dispatcher.cc",
+    "tools/quic/quic_dispatcher.h",
     "tools/quic/quic_in_memory_cache.cc",
     "tools/quic/quic_in_memory_cache.h",
+    "tools/quic/quic_per_connection_packet_writer.cc",
+    "tools/quic/quic_per_connection_packet_writer.h",
     "tools/quic/quic_server_session.cc",
     "tools/quic/quic_server_session.h",
     "tools/quic/quic_simple_client.cc",