Expose Blimp dependencies to the embedder

blimp/client/feature/compositor/mock_compositor_dependencies.cc

+// 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.
+
+#include "blimp/client/feature/compositor/mock_compositor_dependencies.h"
+
+#include "cc/test/test_in_process_context_provider.h"
+
+namespace blimp {
+namespace client {
+
+void MockCompositorDependencies::GetContextProvider(
+    const ContextProviderCallback& callback) {
+  scoped_refptr<cc::ContextProvider> provider =
+      make_scoped_refptr(new cc::TestInProcessContextProvider(nullptr));
+  callback.Run(provider);
+}
+
+}  // namespace client
+}  // namespace blimp