Add method to convert visible networks into Proto

chrome/android/BUILD.gn

Index: chrome/android/BUILD.gn
diff --git a/chrome/android/BUILD.gn b/chrome/android/BUILD.gn
index e3cec7c0ffd97a0c805c861333942ff4cbdb8cd8..71ead755937b2a4c033ac1eaec0773441e08334f 100644
--- a/chrome/android/BUILD.gn
+++ b/chrome/android/BUILD.gn
@@ -347,6 +347,7 @@ junit_binary("chrome_junit_tests") {
     ":app_hooks_java",
     ":chrome_java",
     ":chrome_java_resources",
+    ":partner_location_descriptor_proto_java",
     "//base:base_java",
     "//base:base_java_test_support",
     "//chrome/android/webapk/libs/client:client_java",
@@ -376,6 +377,7 @@ junit_binary("chrome_junit_tests") {
     "//third_party/WebKit/public:android_mojo_bindings_java",
     "//third_party/WebKit/public:blink_headers_java",
     "//third_party/WebKit/public:mojo_bindings_java",
+    "//third_party/android_protobuf:protobuf_nano_javalib",
     "//third_party/android_tools:android_support_annotations_java",
     "//third_party/android_tools:android_support_v7_appcompat_java",
     "//third_party/android_tools:android_support_v7_mediarouter_java",