json parser/writer correctness fuzzer

base/BUILD.gn

Index: base/BUILD.gn
diff --git a/base/BUILD.gn b/base/BUILD.gn
index 1c47b51f922ea12e2ee5c48af724e507518f0fbb..4c30e1fe20ea5b2435581c79984228ee40f1d685 100644
--- a/base/BUILD.gn
+++ b/base/BUILD.gn
@@ -27,6 +27,7 @@ import("//build/config/nacl/config.gni")
 import("//build/config/sysroot.gni")
 import("//build/config/ui.gni")
 import("//build/nocompile.gni")
+import("//testing/libfuzzer/fuzzer_test.gni")
 import("//testing/test.gni")
 
 declare_args() {
@@ -2455,3 +2456,12 @@ if (is_android) {
     ]
   }
 }
+
+fuzzer_test("base_json_correctness_fuzzer") {
+  sources = [
+    "json/correctness_fuzzer.cc",
+  ]
+  deps = [
+    ":base",
+  ]
+}