Remove RequestTracker from WebStateImpl.

ios/web/web_state/web_state_impl.h

Index: ios/web/web_state/web_state_impl.h
diff --git a/ios/web/web_state/web_state_impl.h b/ios/web/web_state/web_state_impl.h
index ed7214fe7f1c15f62d2545f7dcab5378b17884cf..e0f543be3b043b404e4042f384c99e51c1cae538 100644
--- a/ios/web/web_state/web_state_impl.h
+++ b/ios/web/web_state/web_state_impl.h
@@ -192,27 +192,6 @@ class WebStateImpl : public WebState, public NavigationManagerDelegate {
   // allowed to continue by asking its policy deciders. Defaults to true.
   bool ShouldAllowResponse(NSURLResponse* response);
 
-  // Request tracker management. For now, this exposes the RequestTracker for
-  // embedders to use.
-  // TODO(stuartmorgan): RequestTracker should become an internal detail of this
-  // class.
-
-  // 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();
-
-  // 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:
   WebStateDelegate* GetDelegate() override;
   void SetDelegate(WebStateDelegate* delegate) override;
@@ -351,14 +330,6 @@ class WebStateImpl : public WebState, public NavigationManagerDelegate {
   // Returned by reference.
   base::string16 empty_string16_;
 
-  // Request tracker associted with this object.
-  scoped_refptr<RequestTrackerImpl> request_tracker_;
-
-  // 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_;