Refactor Blink's ServiceConnector and add ability to mock in layout tests

content/renderer/mojo/blink_connector_js_wrapper.h

+// Copyright 2017 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_RENDERER_MOJO_BLINK_CONNECTOR_JS_WRAPPER_H_
+#define CONTENT_RENDERER_MOJO_BLINK_CONNECTOR_JS_WRAPPER_H_
+
+#include <string>
+
+#include "base/macros.h"
+#include "content/common/content_export.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 content {
+
+class BlinkConnectorImpl;
+
+// A JS wrapper around blink::Connector that allows connecting to remote
+// services.
+class CONTENT_EXPORT BlinkConnectorJsWrapper
+    : public gin::Wrappable<BlinkConnectorJsWrapper> {
+ public:
+  ~BlinkConnectorJsWrapper() override;
+  static gin::Handle<BlinkConnectorJsWrapper> Create(
+      v8::Isolate* isolate,
+      v8::Handle<v8::Context> context,
+      BlinkConnectorImpl* remote_interfaces);
+
+  // gin::Wrappable<BlinkConnectorJsWrapper> overrides.
+  gin::ObjectTemplateBuilder GetObjectTemplateBuilder(
+      v8::Isolate* isolate) override;
+
+  // JS interface implementation.
+  void AddOverrideForTesting(const std::string& service_name,
+                             const std::string& interface_name,
+                             v8::Local<v8::Function> interface_factory);
+  void ClearOverridesForTesting();
+  mojo::Handle BindInterface(const std::string& service_name,
+                             const std::string& interface_name);
+
+  static gin::WrapperInfo kWrapperInfo;
+  static const char kModuleName[];
+
+ private:
+  using ScopedJsFactory =
+      v8::Persistent<v8::Function, v8::CopyablePersistentTraits<v8::Function>>;
+
+  BlinkConnectorJsWrapper(v8::Isolate* isolate,
+                          v8::Handle<v8::Context> context,
+                          base::WeakPtr<BlinkConnectorImpl> connector);
+
+  void CallJsFactory(const ScopedJsFactory& factory,
+                     mojo::ScopedMessagePipeHandle pipe);
+
+  static void ClearContext(
+      const v8::WeakCallbackInfo<BlinkConnectorJsWrapper>& data);
+
+  v8::Isolate* isolate_;
+  v8::Global<v8::Context> context_;
+  base::WeakPtr<BlinkConnectorImpl> connector_;
+
+  base::WeakPtrFactory<BlinkConnectorJsWrapper> weak_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(BlinkConnectorJsWrapper);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_RENDERER_MOJO_BLINK_CONNECTOR_JS_WRAPPER_H_