[Blimp] Adds blimp engine browser test framework and LoadUrl test.

blimp/client/feature/mock_render_widget_feature_delegate.cc

Index: blimp/client/feature/mock_render_widget_feature_delegate.cc
diff --git a/blimp/client/feature/mock_render_widget_feature_delegate.cc b/blimp/client/feature/mock_render_widget_feature_delegate.cc
new file mode 100644
index 0000000000000000000000000000000000000000..0d9703d6d5dc25691021255b1c0441d1afde1467
--- /dev/null
+++ b/blimp/client/feature/mock_render_widget_feature_delegate.cc
@@ -0,0 +1,21 @@
+// 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/mock_render_widget_feature_delegate.h"
+
+namespace blimp {
+namespace client {
+
+MockRenderWidgetFeatureDelegate::MockRenderWidgetFeatureDelegate() {}
+
+MockRenderWidgetFeatureDelegate::~MockRenderWidgetFeatureDelegate() {}
+
+void MockRenderWidgetFeatureDelegate::OnCompositorMessageReceived(
+    int render_widget_id,
+    std::unique_ptr<cc::proto::CompositorMessage> message) {
+  MockableOnCompositorMessageReceived(render_widget_id, message.get());
+}
+
+}  // namespace client
+}  // namespace blimp