Add BlimpDocument, pull out functions in BlimpCompositor.

blimp/client/test/render_widget/mock_render_widget_feature.h

Index: blimp/client/test/render_widget/mock_render_widget_feature.h
diff --git a/blimp/client/test/render_widget/mock_render_widget_feature.h b/blimp/client/test/render_widget/mock_render_widget_feature.h
new file mode 100644
index 0000000000000000000000000000000000000000..3f05e08023031de1cf3337e28ff9971178fb2329
--- /dev/null
+++ b/blimp/client/test/render_widget/mock_render_widget_feature.h
@@ -0,0 +1,36 @@
+// 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 BLIMP_CLIENT_TEST_RENDER_WIDGET_MOCK_RENDER_WIDGET_FEATURE_H_
+#define BLIMP_CLIENT_TEST_RENDER_WIDGET_MOCK_RENDER_WIDGET_FEATURE_H_
+
+#include "blimp/client/core/render_widget/render_widget_feature.h"
+
+#include "base/macros.h"
+#include "cc/proto/compositor_message.pb.h"
+#include "testing/gmock/include/gmock/gmock.h"
+#include "third_party/WebKit/public/platform/WebInputEvent.h"
+
+namespace blimp {
+namespace client {
+
+class MockRenderWidgetFeature : public RenderWidgetFeature {

[David Trainor- moved to gerrit, 2016/10/04 22:29:02]

Should this live near RenderWidgetFeature?

[xingliu, 2016/10/05 00:40:08]

Makes sense, seems only two core unit tests depend on this class.

+ public:
+  MockRenderWidgetFeature();
+  ~MockRenderWidgetFeature() override;
+
+  MOCK_METHOD3(SendCompositorMessage,
+               void(const int, const int, const cc::proto::CompositorMessage&));
+  MOCK_METHOD3(SendWebGestureEvent,
+               void(const int, const int, const blink::WebGestureEvent&));
+
+  // RenderWidgetFeature implementation.
+  MOCK_METHOD2(SetDelegate, void(int, RenderWidgetFeatureDelegate*));
+  MOCK_METHOD1(RemoveDelegate, void(const int));
+};
+
+}  // namespace client
+}  // namespace blimp
+
+#endif  // BLIMP_CLIENT_TEST_RENDER_WIDGET_MOCK_RENDER_WIDGET_FEATURE_H_