Add a Javascript wrapper for InterfaceRegistry.

content/shell/renderer/layout_test/interface_registry_js_wrapper.h

Index: content/shell/renderer/layout_test/interface_registry_js_wrapper.h
diff --git a/content/shell/renderer/layout_test/interface_registry_js_wrapper.h b/content/shell/renderer/layout_test/interface_registry_js_wrapper.h
new file mode 100644
index 0000000000000000000000000000000000000000..57498a6d47b5aa9ab0fb8211b9b994a7d351f60f
--- /dev/null
+++ b/content/shell/renderer/layout_test/interface_registry_js_wrapper.h
@@ -0,0 +1,71 @@
+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CONTENT_SHELL_RENDERER_LAYOUT_TEST_INTERFACE_REGISTRY_JS_WRAPPER_H_
+#define CONTENT_SHELL_RENDERER_LAYOUT_TEST_INTERFACE_REGISTRY_JS_WRAPPER_H_
+
+#include <string>
+
+#include "base/macros.h"
+#include "gin/handle.h"
+#include "gin/object_template_builder.h"
+#include "gin/wrappable.h"
+#include "mojo/public/cpp/system/message_pipe.h"
+#include "v8/include/v8.h"
+
+namespace shell {
+class InterfaceRegistry;
+}
+
+namespace content {
+
+// A JS wrapper around shell::InterfaceRegistry that allows connecting to
+// interfaces exposed by the renderer for testing.
+class InterfaceRegistryJsWrapper
+    : public gin::Wrappable<InterfaceRegistryJsWrapper> {
+ public:
+  static gin::Handle<InterfaceRegistryJsWrapper> Create(
+      v8::Isolate* isolate,
+      v8::Handle<v8::Context> context,
+      shell::InterfaceRegistry* interface_registry);
+
+  // gin::Wrappable<InterfaceRegistryJsWrapper> overrides.
+  gin::ObjectTemplateBuilder GetObjectTemplateBuilder(
+      v8::Isolate* isolate) override;
+
+  // JS interface implementation.
+  mojo::Handle GetLocalInterfaceForTesting(const std::string& interface_name);
+
+  static gin::WrapperInfo kWrapperInfo;
+  static const char kPerFrameModuleName[];
+  static const char kPerProcessModuleName[];
+
+ private:
+  using ScopedJsFactory =
+      v8::Persistent<v8::Function, v8::CopyablePersistentTraits<v8::Function>>;
+
+  InterfaceRegistryJsWrapper(
+      v8::Isolate* isolate,
+      v8::Handle<v8::Context> context,
+      base::WeakPtr<shell::InterfaceRegistry> interface_registry);
+  ~InterfaceRegistryJsWrapper() override;
+
+  void CallJsFactory(const ScopedJsFactory& factory,
+                     mojo::ScopedMessagePipeHandle pipe);
+
+  static void ClearContext(
+      const v8::WeakCallbackInfo<InterfaceRegistryJsWrapper>& data);
+
+  v8::Isolate* isolate_;
+  v8::Global<v8::Context> context_;
+  base::WeakPtr<shell::InterfaceRegistry> interface_registry_;
+
+  base::WeakPtrFactory<InterfaceRegistryJsWrapper> weak_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(InterfaceRegistryJsWrapper);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_SHELL_RENDERER_LAYOUT_TEST_INTERFACE_REGISTRY_JS_WRAPPER_H_