Remove all blimp client code.

blimp/client/core/settings/android/settings_observer_proxy.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_SETTINGS_ANDROID_SETTINGS_OBSERVER_PROXY_H_
-#define BLIMP_CLIENT_CORE_SETTINGS_ANDROID_SETTINGS_OBSERVER_PROXY_H_
-
-#include "base/android/jni_android.h"
-#include "base/android/scoped_java_ref.h"
-#include "base/macros.h"
-#include "blimp/client/core/settings/android/settings_android.h"
-#include "blimp/client/core/settings/settings_observer.h"
-
-namespace blimp {
-namespace client {
-
-class SettingsObserverProxy : public SettingsObserver {
- public:
-  static bool RegisterJni(JNIEnv* env);
-
-  SettingsObserverProxy(JNIEnv* env,
-                        jobject obj,
-                        SettingsAndroid* settings_android);
-  ~SettingsObserverProxy() override;
-
-  void Destroy(JNIEnv* env, const base::android::JavaParamRef<jobject>& obj);
-
-  // SettingsObserver implementation.
-  void OnBlimpModeEnabled(bool enable) override;
-  void OnShowNetworkStatsChanged(bool enable) override;
-  void OnRecordWholeDocumentChanged(bool enable) override;
-  void OnRestartRequired() override;
-
- private:
-  base::android::ScopedJavaGlobalRef<jobject> java_obj_;
-
-  SettingsAndroid* settings_android_;
-
-  DISALLOW_COPY_AND_ASSIGN(SettingsObserverProxy);
-};
-
-}  // namespace client
-}  // namespace blimp
-
-#endif  // BLIMP_CLIENT_CORE_SETTINGS_ANDROID_SETTINGS_OBSERVER_PROXY_H_