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

third_party/WebKit/public/platform/Connector.h

+// 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 Connector_h
+#define Connector_h
+
+#include "mojo/public/cpp/bindings/interface_request.h"
+#include "mojo/public/cpp/system/message_pipe.h"
+#include "public/platform/WebCommon.h"
+
+namespace blink {
+
+// Supports obtaining interfaces from services specified by name.
+class BLINK_PLATFORM_EXPORT Connector {
+ public:
+  virtual void bindInterface(const char* serviceName,
+                             const char* interfaceName,
+                             mojo::ScopedMessagePipeHandle) = 0;
+
+  template <typename Interface>
+  void bindInterface(const char* serviceName,
+                     mojo::InterfaceRequest<Interface> ptr) {
+    bindInterface(serviceName, Interface::Name_, ptr.PassMessagePipe());
+  }
+
+  static Connector* getEmptyConnector();
+};
+
+}  // namespace blink
+
+#endif