[ios] WebStateList owns all WebState it manages.

ios/chrome/browser/tabs/tab.h

Index: ios/chrome/browser/tabs/tab.h
diff --git a/ios/chrome/browser/tabs/tab.h b/ios/chrome/browser/tabs/tab.h
index 7d8fd8adcff9312ea33a4e6502ce39ea33505b11..8d6b1ce2c1e91cf72efaf2c5ab4bd5ada5110ebb 100644
--- a/ios/chrome/browser/tabs/tab.h
+++ b/ios/chrome/browser/tabs/tab.h
@@ -59,7 +59,6 @@ namespace web {
 class NavigationItem;
 class NavigationManager;
 class NavigationManagerImpl;
-struct Referrer;
 class WebState;
 }
 
@@ -119,12 +118,6 @@ extern NSString* const kProxyPassthroughHeaderValue;
 // ID associated with this tab.
 @property(nonatomic, readonly) NSString* tabId;
 
-// ID of the opener of this tab.
-@property(nonatomic, readonly) NSString* openerID;
-
-// NavigationIndex of the opener of this tab.
-@property(nonatomic, readonly) NSInteger openerNavigationIndex;
-
 // |YES| if snapshot overlay should load from the grey image cache.
 @property(nonatomic, assign) BOOL useGreyImageCache;
 
@@ -166,43 +159,11 @@ extern NSString* const kProxyPassthroughHeaderValue;
 // |YES| if the tab has finished loading.
 @property(nonatomic, readonly) BOOL loadFinished;
 
-// Creates a new tab with the given state. |opener| is nil unless another tab
-// is conceptually the parent of this tab. |openedByDOM| is YES if the page was
-// opened by DOM. |model| and |browserState| must not be nil.
-- (instancetype)initWithBrowserState:(ios::ChromeBrowserState*)browserState
-                              opener:(Tab*)opener
-                         openedByDOM:(BOOL)openedByDOM
-                               model:(TabModel*)parentModel;
-
-// Create a new tab with given web state and tab model. All must be non-nil.
-- (instancetype)initWithWebState:(std::unique_ptr<web::WebState>)webState
-                           model:(TabModel*)parentModel;
-
-// Create a new tab with given web state and tab model, optionally attaching
-// the tab helpers (controlled by |attachTabHelpers|). All must be non-nil.
-- (instancetype)initWithWebState:(std::unique_ptr<web::WebState>)webState
-                           model:(TabModel*)parentModel
-                attachTabHelpers:(BOOL)attachTabHelpers
-    NS_DESIGNATED_INITIALIZER;
+// Creates a new Tab with the given WebState.
+- (instancetype)initWithWebState:(web::WebState*)webState;
 
 - (instancetype)init NS_UNAVAILABLE;
 
-// Creates a new Tab instance loading |url| with |transition|, configured
-// with no TabModel. |opener| may be nil, and behaves exactly as for
-// -initWithBrowserState:opener:openedByDOM:model. |configuration| is a block
-// that will be run before |url| starts loading, and is the correct place to set
-// properties and delegates on the tab. Calling code must take ownership of the
-// tab -- this is particularly important with Tab instances, because they will
-// fail a DCHECK if they are deallocated without -close being called.
-+ (Tab*)preloadingTabWithBrowserState:(ios::ChromeBrowserState*)browserState
-                                  url:(const GURL&)url
-                             referrer:(const web::Referrer&)referrer
-                           transition:(ui::PageTransition)transition
-                             provider:(id<CRWNativeContentProvider>)provider
-                               opener:(Tab*)opener
-                     desktopUserAgent:(BOOL)desktopUserAgent
-                        configuration:(void (^)(Tab*))configuration;
-
 // Sets the parent tab model for this tab.  Can only be called if the tab does
 // not already have a parent tab model set.
 // TODO(crbug.com/228575): Create a delegate interface and remove this.
@@ -237,9 +198,6 @@ extern NSString* const kProxyPassthroughHeaderValue;
 // after this method completes.
 - (void)terminateNetworkActivity;
 
-// Starts the tab's shutdown sequence.
-- (void)close;
-
 // Dismisses all modals owned by the tab.
 - (void)dismissModals;