Move http_server_properties_manager from chrome/browser/net to net/http.

net/BUILD.gn

Index: net/BUILD.gn
diff --git a/net/BUILD.gn b/net/BUILD.gn
index 2ee68d39d1590b20546b1405314ab308b7e097df..28caef73aca165a8a6dfcbea53c368a7f490bf66 100644
--- a/net/BUILD.gn
+++ b/net/BUILD.gn
@@ -85,6 +85,7 @@ component("net") {
    ":net_resources",
     "//base",
     "//base:i18n",
+    "//base:prefs",
     "//base/third_party/dynamic_annotations",
     "//crypto",
     "//crypto:platform",
@@ -520,7 +521,7 @@ component("net") {
       include_dirs = [ "//third_party/openssl" ]
     }
   }
-  
+
   if (use_icu_alternatives_on_android) {
     deps -= [
       "//base:i18n",
@@ -1063,6 +1064,7 @@ test("net_unittests") {
     ":test_support",
     "//base",
     "//base:i18n",
+    "//base:prefs_test_support",
     "//base/allocator",
     "//base/third_party/dynamic_annotations",
     "//crypto",