[Autofill] Remove GZIP compression since requests are now in proto

components/autofill/core/browser/autofill_download_manager.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.
 
 #include "components/autofill/core/browser/autofill_download_manager.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/numerics/safe_conversions.h"
 #include "base/rand_util.h"
 #include "base/stl_util.h"
 #include "base/strings/string_util.h"
 #include "base/thread_task_runner_handle.h"
 #include "components/autofill/core/browser/autofill_driver.h"
 #include "components/autofill/core/browser/autofill_metrics.h"
 #include "components/autofill/core/browser/form_structure.h"
 #include "components/autofill/core/browser/proto/server.pb.h"
 #include "components/autofill/core/common/autofill_pref_names.h"
 #include "components/data_use_measurement/core/data_use_user_data.h"
 #include "components/variations/net/variations_http_headers.h"
 #include "net/base/load_flags.h"
 #include "net/http/http_request_headers.h"
 #include "net/http/http_response_headers.h"
 #include "net/http/http_status_code.h"
 #include "net/url_request/url_fetcher.h"
-#include "third_party/zlib/google/compression_utils.h"
 #include "url/gurl.h"
 
 namespace autofill {
 
 namespace {
 
 const size_t kMaxFormCacheSize = 16;
 const size_t kMaxFieldsPerQueryRequest = 100;
 
 const net::BackoffEntry::Policy kAutofillBackoffPolicy = {
@@ skipping 191 matching lines @@
   return StartRequest(request_data);
 }
 
 bool AutofillDownloadManager::StartRequest(
     const FormRequestData& request_data) {
   net::URLRequestContextGetter* request_context =
       driver_->GetURLRequestContext();
   DCHECK(request_context);
   GURL request_url = GetRequestUrl(request_data.request_type);
 
-  // TODO(crbug.com/580102): Remove the compression step.
-  std::string compressed_data;
-  if (!compression::GzipCompress(request_data.payload, &compressed_data)) {
-    NOTREACHED();
-    return false;
-  }
-
-  const int compression_ratio = base::checked_cast<int>(
-      100 * compressed_data.size() / request_data.payload.size());
-  AutofillMetrics::LogPayloadCompressionRatio(compression_ratio,
-                                              request_data.request_type);
-
   // Id is ignored for regular chrome, in unit test id's for fake fetcher
   // factory will be 0, 1, 2, ...
   net::URLFetcher* fetcher =
       net::URLFetcher::Create(fetcher_id_for_unittest_++, request_url,
                               net::URLFetcher::POST, this).release();
   data_use_measurement::DataUseUserData::AttachToFetcher(
       fetcher, data_use_measurement::DataUseUserData::AUTOFILL);
   url_fetchers_[fetcher] = request_data;
   fetcher->SetAutomaticallyRetryOn5xx(false);
   fetcher->SetRequestContext(request_context);
-  fetcher->SetUploadData("text/proto", compressed_data);
+  fetcher->SetUploadData("text/proto", request_data.payload);
   fetcher->SetLoadFlags(net::LOAD_DO_NOT_SAVE_COOKIES |
                         net::LOAD_DO_NOT_SEND_COOKIES);
-  // Add Chrome experiment state and GZIP encoding to the request headers.
+  // Add Chrome experiment state to the request headers.
   net::HttpRequestHeaders headers;
-  headers.SetHeaderIfMissing("content-encoding", "gzip");
   variations::AppendVariationHeaders(
       fetcher->GetOriginalURL(), driver_->IsOffTheRecord(), false, &headers);
   fetcher->SetExtraRequestHeaders(headers.ToString());
   fetcher->Start();
 
   return true;
 }
 
 void AutofillDownloadManager::CacheQueryRequest(
     const std::vector<std::string>& forms_in_query,
@@ skipping 87 matching lines @@
     } else {
       VLOG(1) << "AutofillDownloadManager: upload request has succeeded.";
       observer_->OnUploadedPossibleFieldTypes();
     }
   }
   delete it->first;
   url_fetchers_.erase(it);
 }
 
 }  // namespace autofill