Removed webControllerDidSuppressDialog: callback.

ios/web/public/web_state/web_state_observer.h

Index: ios/web/public/web_state/web_state_observer.h
diff --git a/ios/web/public/web_state/web_state_observer.h b/ios/web/public/web_state/web_state_observer.h
index 100312cc84f622f9b8f800c822680527d03c3e19..2d84681c73d0bcd7d8fef8f3ab7c8e1778e2260a 100644
--- a/ios/web/public/web_state/web_state_observer.h
+++ b/ios/web/public/web_state/web_state_observer.h
@@ -91,6 +91,12 @@ class WebStateObserver {
   // Called when the visible security state of the page changes.
   virtual void DidChangeVisibleSecurityState() {}
 
+  // Called when a dialog (JavaScript, geolocation) or window open request was
+  // suppressed.
+  // NOTE: Called only if WebState::SetShouldSuppressDialogs() was called with
+  // false.
+  virtual void DidSuppressDialog() {}
+
   // Called on form submission. |user_initiated| is true if the user
   // interacted with the page.
   virtual void DocumentSubmitted(const std::string& form_name,