[ios] Removed RequestTracker dependency from WebLoadParams.

ios/web/web_state/web_state_impl.h

 // 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.
 
 #ifndef IOS_WEB_WEB_STATE_WEB_STATE_IMPL_H_
 #define IOS_WEB_WEB_STATE_WEB_STATE_IMPL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 190 matching lines @@
 
   // Create a new tracker using |delegate| as its delegate.
   void InitializeRequestTracker(id<CRWRequestTrackerDelegate> delegate);
 
   // Close the request tracker and delete it.
   void CloseRequestTracker();
 
   // Returns the tracker for this WebStateImpl.
   RequestTrackerImpl* GetRequestTracker();
 
-  // Gets and sets the mode controlling the HTTP cache behavior.
-  // TODO(rohitrao): As with the other RequestTracker-related methods, this
-  // should become an internal detail of this class.
-  net::RequestTracker::CacheMode GetCacheMode();
-  void SetCacheMode(net::RequestTracker::CacheMode mode);
-
   // Lazily creates (if necessary) and returns |request_group_id_|.
   // IMPORTANT: This should not be used for anything other than associating this
   // instance to network requests.
   // This function is only intended to be used in web/.
   // TODO(stuartmorgan): Move this method in an implementation file in web/.
   NSString* GetRequestGroupID();
 
   // WebState:
   UIView* GetView() override;
   web::WebViewType GetWebViewType() const override;
@@ skipping 96 matching lines @@
 
   // Weak pointer to the interstitial page being displayed, if any.
   WebInterstitialImpl* interstitial_;
 
   // Returned by reference.
   base::string16 empty_string16_;
 
   // Request tracker associted with this object.
   scoped_refptr<RequestTrackerImpl> request_tracker_;
 
-  // Mode controlling the HTTP cache behavior.
-  net::RequestTracker::CacheMode cache_mode_;
-
   // A number identifying this object. This number is injected into the user
   // agent to allow the network layer to know which web view requests originated
   // from.
   base::scoped_nsobject<NSString> request_group_id_;
 
   // Callbacks associated to command prefixes.
   std::map<std::string, ScriptCommandCallback> script_command_callbacks_;
 
   // Member variables should appear before the WeakPtrFactory<> to ensure that
   // any WeakPtrs to WebStateImpl are invalidated before its member variable's
   // destructors are executed, rendering them invalid.
   base::WeakPtrFactory<WebState> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(WebStateImpl);
 };
 
 }  // namespace web
 
 #endif  // IOS_WEB_WEB_STATE_WEB_STATE_IMPL_H_