PaymentApp: Implement PaymentAppProvider for LayoutTest.

components/test_runner/test_runner_for_specific_view.cc

Index: components/test_runner/test_runner_for_specific_view.cc
diff --git a/components/test_runner/test_runner_for_specific_view.cc b/components/test_runner/test_runner_for_specific_view.cc
index 026a715908e58ab286b7085a9c0b31f2d40e0864..f29cb45a95efb2031fd93adf77df3ebfa1200812 100644
--- a/components/test_runner/test_runner_for_specific_view.cc
+++ b/components/test_runner/test_runner_for_specific_view.cc
@@ -366,6 +366,40 @@ void TestRunnerForSpecificView::SendBluetoothManualChooserEvent(
   delegate()->SendBluetoothManualChooserEvent(event, argument);
 }
 
+void TestRunnerForSpecificView::GetAllPaymentAppIDs(
+    v8::Local<v8::Function> callback) {
+  delegate()->GetAllPaymentAppIDs(
+      base::Bind(&TestRunnerForSpecificView::GetAllPaymentAppIDsCallback,
+                 weak_factory_.GetWeakPtr(),
+                 base::Passed(v8::UniquePersistent<v8::Function>(
+                     blink::mainThreadIsolate(), callback))));
+}
+
+void TestRunnerForSpecificView::GetAllPaymentAppIDsCallback(
+    v8::UniquePersistent<v8::Function> callback,
+    const std::vector<int64_t>& ids) {
+  // Build the V8 context.
+  v8::Isolate* isolate = blink::mainThreadIsolate();
+  v8::HandleScope handle_scope(isolate);
+  v8::Local<v8::Context> context =
+      web_view()->mainFrame()->mainWorldScriptContext();
+  if (context.IsEmpty())
+    return;
+  v8::Context::Scope context_scope(context);
+
+  // Convert the argument.
+  v8::Local<v8::Value> arg;
+  if (!gin::TryConvertToV8(isolate, ids, &arg))
+    return;
+
+  // Call the callback.
+  PostV8CallbackWithArgs(std::move(callback), 1, &arg);
+}
+
+void TestRunnerForSpecificView::InvokePaymentApp(int64_t registration_id) {
+  delegate()->InvokePaymentApp(registration_id);
+}
+
 void TestRunnerForSpecificView::SetBackingScaleFactor(
     double value,
     v8::Local<v8::Function> callback) {