[ios clean] ToolsMenu Mediator observes Webstate.

ios/clean/chrome/browser/ui/tools/tools_mediator.h

Index: ios/clean/chrome/browser/ui/tools/tools_mediator.h
diff --git a/ios/clean/chrome/browser/ui/tools/tools_mediator.h b/ios/clean/chrome/browser/ui/tools/tools_mediator.h
index d13f54d914687f3b677f1b7a8a80d07c5a85993e..de0fefa89fae15353f803e0329375b54c83703f7 100644
--- a/ios/clean/chrome/browser/ui/tools/tools_mediator.h
+++ b/ios/clean/chrome/browser/ui/tools/tools_mediator.h
@@ -9,14 +9,22 @@
 
 @protocol ToolsConsumer;
 @class ToolsMenuConfiguration;
+namespace web {
+class WebState;
+}
 
 // A mediator object that sets a ToolsMenuVC appeareance based on various data
 // sources.
 @interface ToolsMediator : NSObject
-- (instancetype)initWithConsumer:(id<ToolsConsumer>)consumer
-                andConfiguration:(ToolsMenuConfiguration*)menuConfiguration
+- (nullable instancetype)initWithConsumer:(nonnull id<ToolsConsumer>)consumer
+                            configuration:(nonnull ToolsMenuConfiguration*)
+                                              menuConfiguration
     NS_DESIGNATED_INITIALIZER;
-- (instancetype)init NS_UNAVAILABLE;
+- (nullable instancetype)init NS_UNAVAILABLE;
+
+// The WebState whose properties this object mediates. This can change during
+// the lifetime of this object and may be null.
+@property(nonatomic, assign, nullable) web::WebState* webState;
 @end
 
 #endif  // IOS_CLEAN_CHROME_BROWSER_UI_TOOLS_TOOLS_MEDIATOR_H_