Remove all blimp client code.

blimp/client/test/contents/mock_blimp_contents_observer.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_TEST_CONTENTS_MOCK_BLIMP_CONTENTS_OBSERVER_H_
-#define BLIMP_CLIENT_TEST_CONTENTS_MOCK_BLIMP_CONTENTS_OBSERVER_H_
-
-#include "blimp/client/public/contents/blimp_contents_observer.h"
-#include "testing/gmock/include/gmock/gmock.h"
-
-namespace blimp {
-namespace client {
-
-class MockBlimpContentsObserver : public BlimpContentsObserver {
- public:
-  explicit MockBlimpContentsObserver(BlimpContents* contents);
-  ~MockBlimpContentsObserver() override;
-
-  MOCK_METHOD0(OnNavigationStateChanged, void());
-  MOCK_METHOD1(OnLoadingStateChanged, void(bool loading));
-  MOCK_METHOD1(OnPageLoadingStateChanged, void(bool loading));
-  MOCK_METHOD0(OnContentsDestroyed, void());
-};
-
-}  // namespace client
-}  // namespace blimp
-
-#endif  // BLIMP_CLIENT_TEST_CONTENTS_MOCK_BLIMP_CONTENTS_OBSERVER_H_