Delete the non-static CLD data source logic.

components/translate/content/renderer/data_file_renderer_cld_data_provider.cc

-// 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
-
-#include "components/translate/content/renderer/data_file_renderer_cld_data_provider.h"
-
-#include <utility>
-
-#include "base/files/file.h"
-#include "base/files/memory_mapped_file.h"
-#include "base/lazy_instance.h"
-#include "base/logging.h"
-#include "components/translate/content/common/data_file_cld_data_provider_messages.h"
-#include "content/public/renderer/render_frame_observer.h"
-#include "ipc/ipc_message.h"
-#include "ipc/ipc_message_macros.h"
-#include "ipc/ipc_platform_file.h"
-#include "third_party/cld_2/src/public/compact_lang_det.h"
-
-namespace {
-
-// A struct that contains the pointer to the CLD mmap. Used so that we can
-// leverage LazyInstance:Leaky to properly scope the lifetime of the mmap.
-struct CLDMmapWrapper {
-  CLDMmapWrapper() { value = NULL; }
-  base::MemoryMappedFile* value;
-};
-base::LazyInstance<CLDMmapWrapper>::Leaky g_cld_mmap =
-    LAZY_INSTANCE_INITIALIZER;
-
-}  // namespace
-
-namespace translate {
-
-DataFileRendererCldDataProvider::DataFileRendererCldDataProvider(
-    content::RenderFrameObserver* render_frame_observer)
-    : render_frame_observer_(render_frame_observer) {
-}
-
-DataFileRendererCldDataProvider::~DataFileRendererCldDataProvider() {
-}
-
-bool DataFileRendererCldDataProvider::OnMessageReceived(
-    const IPC::Message& message) {
-  bool handled = true;
-  IPC_BEGIN_MESSAGE_MAP(DataFileRendererCldDataProvider, message)
-  IPC_MESSAGE_HANDLER(ChromeFrameMsg_CldDataFileAvailable, OnCldDataAvailable)
-  IPC_MESSAGE_UNHANDLED(handled = false)
-  IPC_END_MESSAGE_MAP()
-  return handled;
-}
-
-void DataFileRendererCldDataProvider::SendCldDataRequest() {
-  // Else, send the IPC message to the browser process requesting the data...
-  render_frame_observer_->Send(new ChromeFrameHostMsg_NeedCldDataFile(
-      render_frame_observer_->routing_id()));
-}
-
-bool DataFileRendererCldDataProvider::IsCldDataAvailable() {
-  // This neatly removes the need for code that depends on the generalized
-  // RendererCldDataProvider to #ifdef on CLD2_DYNAMIC_MODE
-  return CLD2::isDataLoaded();  // ground truth, independent of our state.
-}
-
-void DataFileRendererCldDataProvider::SetCldAvailableCallback(
-    base::Callback<void(void)> callback) {
-  cld_available_callback_ = callback;
-}
-
-void DataFileRendererCldDataProvider::OnCldDataAvailable(
-    const IPC::PlatformFileForTransit ipc_file_handle,
-    const uint64_t data_offset,
-    const uint64_t data_length) {
-  LoadCldData(IPC::PlatformFileForTransitToFile(ipc_file_handle),
-              data_offset,
-              data_length);
-}
-
-void DataFileRendererCldDataProvider::LoadCldData(base::File file,
-                                                  const uint64_t data_offset,
-                                                  const uint64_t data_length) {
-  // Terminate immediately if data is already loaded.
-  if (IsCldDataAvailable())
-    return;
-
-  if (!file.IsValid()) {
-    LOG(ERROR) << "Can't find the CLD data file.";
-    return;
-  }
-
-  // mmap the file
-  g_cld_mmap.Get().value = new base::MemoryMappedFile();
-  bool initialized = g_cld_mmap.Get().value->Initialize(std::move(file));
-  if (!initialized) {
-    LOG(ERROR) << "mmap initialization failed";
-    delete g_cld_mmap.Get().value;
-    g_cld_mmap.Get().value = NULL;
-    return;
-  }
-
-  // Sanity checks
-  uint64_t max_int32 = std::numeric_limits<int32_t>::max();
-  if (data_length + data_offset > g_cld_mmap.Get().value->length() ||
-      data_length > max_int32) {  // max signed 32 bit integer
-    LOG(ERROR) << "Illegal mmap config: data_offset=" << data_offset
-               << ", data_length=" << data_length
-               << ", mmap->length()=" << g_cld_mmap.Get().value->length();
-    delete g_cld_mmap.Get().value;
-    g_cld_mmap.Get().value = NULL;
-    return;
-  }
-
-  // Initialize the CLD subsystem... and it's all done!
-  const uint8_t* data_ptr = g_cld_mmap.Get().value->data() + data_offset;
-  CLD2::loadDataFromRawAddress(data_ptr, data_length);
-  DCHECK(CLD2::isDataLoaded()) << "Failed to load CLD data from mmap";
-  if (!cld_available_callback_.is_null()) {
-    cld_available_callback_.Run();
-  }
-}
-
-}  // namespace translate