Add a JSON sanitizer.

components/safe_json/android/BUILD.gn

Index: components/safe_json/android/BUILD.gn
diff --git a/components/precache/android/BUILD.gn b/components/safe_json/android/BUILD.gn
similarity index 50%
copy from components/precache/android/BUILD.gn
copy to components/safe_json/android/BUILD.gn
index 537150b533b654e4708c4d0153b0ae47fe9e55f1..bd8480bf086b4ec13b4b2d49e8a05d979e4429a4 100644
--- a/components/precache/android/BUILD.gn
+++ b/components/safe_json/android/BUILD.gn
@@ -4,18 +4,18 @@
 
 import("//build/config/android/rules.gni")
 
-# GYP: //components/precache.gypi:precache_java
-android_library("precache_java") {
-  deps = [
-    "//base:base_java",
+# GYP: //components/safe_json.gypi:safe_json_jni_headers
+generate_jni("safe_json_jni_headers") {
+  sources = [
+    "java/src/org/chromium/components/safejson/JsonSanitizer.java",
   ]
-  DEPRECATED_java_in_dir = "java/src"
+  jni_package = "safe_json"
 }
 
-android_library("precache_javatests") {
+# GYP: //components/safe_json.gypi:safe_json_java
+android_library("safe_json_java") {
   deps = [
-    "//base:base_java_test_support",
-    ":precache_java",
+    "//base:base_java",
   ]
-  DEPRECATED_java_in_dir = "javatests/src"
+  DEPRECATED_java_in_dir = "java/src"
 }