Added experiments section and exported the list of SafeBrowsing features in WebUI

components/safe_browsing/BUILD.gn

Index: components/safe_browsing/BUILD.gn
diff --git a/components/safe_browsing/BUILD.gn b/components/safe_browsing/BUILD.gn
index 0f05c74633f65efc2e569d1ed0b32bb644b6c61e..7b090bc5bc52a48e04dbbfd5e5b47e22354701b6 100644
--- a/components/safe_browsing/BUILD.gn
+++ b/components/safe_browsing/BUILD.gn
@@ -24,6 +24,7 @@ source_set("safe_browsing") {
   ]
   deps = [
     ":base_ping_manager",
+    ":features",
     "//base:base",
     "//base:i18n",
     "//components/safe_browsing/common:safe_browsing_prefs",
@@ -69,3 +70,14 @@ source_set("base_ping_manager_unittest") {
     "//testing/gtest",
   ]
 }
+
+static_library("features") {
+  sources = [
+    "features.cc",
+    "features.h",
+  ]
+
+  deps = [
+    "//base:base",
+  ]
+}