Scaffolding for Android implementation of PaymentRequest.

chrome/android/BUILD.gn

Index: chrome/android/BUILD.gn
diff --git a/chrome/android/BUILD.gn b/chrome/android/BUILD.gn
index 547e0bcfaf8571e157cfe033c7c6bfc85c86aeaf..c9b55c67ce684efb1252162202343f7674a083a6 100644
--- a/chrome/android/BUILD.gn
+++ b/chrome/android/BUILD.gn
@@ -127,9 +127,12 @@ android_library("chrome_java") {
     "//media/base/android:media_java",
     "//media/capture/video/android:capture_java",
     "//media/midi:midi_java",
+    "//mojo/public/java:bindings",
+    "//mojo/public/java:system",
     "//net/android:net_java",
     "//printing:printing_java",
     "//third_party/WebKit/public:blink_headers_java",
+    "//third_party/WebKit/public:mojo_bindings_java",
     "//third_party/android_data_chart:android_data_chart_java",
     "//third_party/android_media:android_media_java",
     "//third_party/android_protobuf:protobuf_nano_javalib",