Delete the non-static CLD data source logic.

components/translate/content/browser/browser_cld_data_provider.h

-// Copyright 2014 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.
-
-// NOT DEAD CODE!
-// This code isn't dead, even if it isn't currently being used. Please refer to:
-// https://www.chromium.org/developers/how-tos/compact-language-detector-cld-data-source-configuration
-
-#ifndef COMPONENTS_TRANSLATE_CONTENT_BROWSER_BROWSER_CLD_DATA_PROVIDER_H_
-#define COMPONENTS_TRANSLATE_CONTENT_BROWSER_BROWSER_CLD_DATA_PROVIDER_H_
-
-#include <string>
-
-#include "base/compiler_specific.h"
-#include "base/macros.h"
-#include "ipc/ipc_listener.h"
-
-namespace IPC {
-class Message;
-}
-
-namespace translate {
-
-// Browser-side interface responsible for providing CLD data.
-// The implementation must be paired with a renderer-side implementation of
-// the RendererCldDataProvider class:
-//   ../renderer/renderer_cld_data_provider.h
-//
-// The glue between them is typically a pair of request/response IPC messages
-// using the "CldDataProviderMsgStart" IPCMessageStart enumerated constant from
-// ipc_message_start.h
-//
-// In general, instances of this class should be obtained by using the
-// BrowserCldDataProviderFactory::CreateBrowserCldProvider(...). For more
-// information, see browser_cld_data_provider_factory.h.
-class BrowserCldDataProvider : public IPC::Listener {
- public:
-  BrowserCldDataProvider() {}
-  ~BrowserCldDataProvider() override {}
-
-  // IPC::Listener implementation:
-  // If the specified message is a request for CLD data, invokes
-  // OnCldDataRequest() and returns true. In all other cases, this method does
-  // nothing. This method is defined as virtual in order to force the
-  // implementation to define the specific IPC message(s) that it handles.
-  // The default implementation does nothing and returns false.
-  bool OnMessageReceived(const IPC::Message&) override;
-
-  // Called when the browser process receives an appropriate message in
-  // OnMessageReceived, above. The implementation should attempt to locate
-  // the CLD data, cache any metadata required for accessing that data, and
-  // ultimately trigger a response by invoking SendCldDataResponse.
-  // The renderer process may poll for data, in which case this method may be
-  // repeatedly invoked. The implementation must be safe to call any number
-  // of times.
-  // The default implementation does nothing.
-  virtual void OnCldDataRequest() {}
-
-  // Invoked when OnCldDataRequest, above, results in a successful lookup or
-  // the data is already cached and ready to respond to. The implementation
-  // should take whatever action is appropriate for responding to the paired
-  // RendererCldDataProvider, typically by sending an IPC response.
-  // The default implementation does nothing.
-  virtual void SendCldDataResponse() {}
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(BrowserCldDataProvider);
-};
-
-}  // namespace translate
-
-#endif  // COMPONENTS_TRANSLATE_CONTENT_BROWSER_BROWSER_CLD_DATA_PROVIDER_H_