Move sqlite_channel_id_store from chrome/browser/net to net/extras.

net/BUILD.gn

Index: net/BUILD.gn
diff --git a/net/BUILD.gn b/net/BUILD.gn
index d9b2d395114fe93be0906308e5703a47d73f3e80..454f5dcb2bf4c2fd0bf8fbbe1cbbd599f2ddc840 100644
--- a/net/BUILD.gn
+++ b/net/BUILD.gn
@@ -563,6 +563,15 @@ grit("net_resources") {
   ]
 }
 
+static_library("net_extras") {
+  sources = gypi_values.net_extras_sources
+  configs += [ "//build/config/compiler:wexit_time_destructors" ]
+  deps = [
+    ":net",
+    "//sql:sql",
+  ]
+}
+
 static_library("http_server") {
   sources = [
     "server/http_connection.cc",
@@ -1094,6 +1103,7 @@ test("net_unittests") {
   deps = [
     ":http_server",
     ":net",
+    ":net_extras",
     ":quic_tools",
     ":test_support",
     "//base",