[ios] Removed RequestTracker dependency from WebLoadParams.

ios/web/web_state/web_state_impl.mm

 // Copyright 2013 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 "ios/web/web_state/web_state_impl.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include "base/strings/sys_string_conversions.h"
@@ skipping 20 matching lines @@
 
 namespace web {
 
 WebStateImpl::WebStateImpl(BrowserState* browser_state)
     : is_loading_(false),
       is_being_destroyed_(false),
       facade_delegate_(nullptr),
       web_controller_(nil),
       navigation_manager_(this, browser_state),
       interstitial_(nullptr),
-      cache_mode_(net::RequestTracker::CACHE_NORMAL),
       weak_factory_(this) {
   GlobalWebStateEventTracker::GetInstance()->OnWebStateCreated(this);
 }
 
 WebStateImpl::~WebStateImpl() {
   is_being_destroyed_ = true;
 
   // WebUI depends on web state so it must be destroyed first in case any WebUI
   // implementations depends on accessing web state during destruction.
   ClearWebUI();
@@ skipping 380 matching lines @@
 void WebStateImpl::CloseRequestTracker() {
   request_tracker_->Close();
   request_tracker_ = NULL;
 }
 
 RequestTrackerImpl* WebStateImpl::GetRequestTracker() {
   DCHECK(request_tracker_.get());
   return request_tracker_.get();
 }
 
-net::RequestTracker::CacheMode WebStateImpl::GetCacheMode() {
-  return cache_mode_;
-}
-
-void WebStateImpl::SetCacheMode(net::RequestTracker::CacheMode mode) {
-  cache_mode_ = mode;
-}
-
 NSString* WebStateImpl::GetRequestGroupID() {
   if (request_group_id_.get() == nil)
     request_group_id_.reset([GenerateNewRequestGroupID() copy]);
 
   return request_group_id_;
 }
 
 int WebStateImpl::DownloadImage(
     const GURL& url,
     bool is_favicon,
@@ skipping 114 matching lines @@
     const LoadCommittedDetails& load_details) {
   FOR_EACH_OBSERVER(WebStateObserver, observers_,
                     NavigationItemCommitted(load_details));
 }
 
 WebState* WebStateImpl::GetWebState() {
   return this;
 }
 
 }  // namespace web