Remove all blimp client code.

blimp/client/core/context/dummy_blimp_client_context.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_CONTEXT_DUMMY_BLIMP_CLIENT_CONTEXT_H_
-#define BLIMP_CLIENT_CORE_CONTEXT_DUMMY_BLIMP_CLIENT_CONTEXT_H_
-
-#include "base/macros.h"
-#include "blimp/client/public/blimp_client_context.h"
-#include "blimp/client/public/contents/blimp_contents.h"
-
-namespace blimp {
-namespace client {
-
-// A dummy implementation of the BlimpClientContext which is in use by
-// embedders that do not set the GN argument |enable_blimp_client| to true.
-// It exists so that it is possible for an embedder to still have code depending
-// on the public APIs of blimp, without in fact linking in all the core code.
-class DummyBlimpClientContext : public BlimpClientContext {
- public:
-  DummyBlimpClientContext();
-  ~DummyBlimpClientContext() override;
-
-  // BlimpClientContext implementation.
-  void SetDelegate(BlimpClientContextDelegate* delegate) override;
-  std::unique_ptr<BlimpContents> CreateBlimpContents(
-      gfx::NativeWindow window) override;
-  void Connect() override;
-  void ConnectWithAssignment(const Assignment& assignment) override;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(DummyBlimpClientContext);
-};
-
-}  // namespace client
-}  // namespace blimp
-
-#endif  // BLIMP_CLIENT_CORE_CONTEXT_DUMMY_BLIMP_CLIENT_CONTEXT_H_