Remove all blimp client code.

blimp/client/core/contents/mock_navigation_feature_delegate.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 BLIMP_CLIENT_CORE_CONTENTS_MOCK_NAVIGATION_FEATURE_DELEGATE_H_
-#define BLIMP_CLIENT_CORE_CONTENTS_MOCK_NAVIGATION_FEATURE_DELEGATE_H_
-
-#include <string>
-
-#include "blimp/client/core/contents/navigation_feature.h"
-#include "testing/gmock/include/gmock/gmock.h"
-
-class GURL;
-class SkBitmap;
-
-namespace blimp {
-namespace client {
-
-class MockNavigationFeatureDelegate
-    : public NavigationFeature::NavigationFeatureDelegate {
- public:
-  MockNavigationFeatureDelegate();
-  ~MockNavigationFeatureDelegate() override;
-
-  MOCK_METHOD2(OnUrlChanged, void(int tab_id, const GURL& url));
-  MOCK_METHOD2(OnFaviconChanged, void(int tab_id, const SkBitmap& favicon));
-  MOCK_METHOD2(OnTitleChanged, void(int tab_id, const std::string& title));
-  MOCK_METHOD2(OnLoadingChanged, void(int tab_id, bool loading));
-  MOCK_METHOD2(OnPageLoadStatusUpdate, void(int tab_id, bool completed));
-};
-
-}  // namespace client
-}  // namespace blimp
-
-#endif  // BLIMP_CLIENT_CORE_CONTENTS_MOCK_NAVIGATION_FEATURE_DELEGATE_H_