Add a JSON sanitizer.

components/safe_json/BUILD.gn

Index: components/safe_json/BUILD.gn
diff --git a/components/safe_json/BUILD.gn b/components/safe_json/BUILD.gn
index a57efcc6fdb8fa5be1597103c69d87bddfb0889c..079e6baac7353e3f47eaa5f09ad4b8a8be5b393f 100644
--- a/components/safe_json/BUILD.gn
+++ b/components/safe_json/BUILD.gn
@@ -2,11 +2,22 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+if (is_android) {
+  import("//build/config/android/rules.gni")
+}
+
 # GYP version: components/safe_json.gypi:safe_json
 source_set("safe_json") {
   sources = [
+    "android/component_jni_registrar.cc",
+    "android/component_jni_registrar.h",
+    "json_sanitizer.cc",
+    "json_sanitizer.h",
+    "json_sanitizer_android.cc",
     "safe_json_parser.cc",
     "safe_json_parser.h",
+    "safe_json_parser_android.cc",
+    "safe_json_parser_android.h",
     "safe_json_parser_impl.cc",
     "safe_json_parser_impl.h",
   ]
@@ -18,6 +29,30 @@ source_set("safe_json") {
     "//content/public/browser",
     "//ui/base",
   ]
+
+  if (is_android) {
+    sources -= [
+      "json_sanitizer.cc",
+      "safe_json_parser_impl.cc",
+      "safe_json_parser_impl.h",
+    ]
+    deps += [ "android:safe_json_jni_headers" ]
+  }
+}
+
+# GYP version: components/safe_json.gypi:safe_json_unittest_sources
+source_set("unit_tests") {
+  testonly = true
+  sources = [
+    "json_sanitizer_unittest.cc",
+  ]
+
+  deps = [
+    ":safe_json",
+    ":test_support",
+    "//base",
+    "//testing/gtest",
+  ]
 }
 
 # GYP version: components/safe_json.gypi:safe_json_test_support