Introduce WebRequestEventRouterDelegate.

extensions/browser/api/extensions_api_client.h

Index: extensions/browser/api/extensions_api_client.h
diff --git a/extensions/browser/api/extensions_api_client.h b/extensions/browser/api/extensions_api_client.h
index 08c6e3196ddf3da9e940f3e2185c5d56fb91c110..0d7b27f233dcdc80919cd0406da282421e6ca07b 100644
--- a/extensions/browser/api/extensions_api_client.h
+++ b/extensions/browser/api/extensions_api_client.h
@@ -13,6 +13,7 @@
 #include "extensions/browser/api/storage/settings_namespace.h"
 
 class GURL;
+class ExtraRequestParams;
 
 template <class T>
 class ObserverListThreadSafe;
@@ -32,6 +33,7 @@ class WebViewGuest;
 class WebViewGuestDelegate;
 class WebViewPermissionHelper;
 class WebViewPermissionHelperDelegate;
+class WebRequestEventRouterDelegate;
 class SettingsObserver;
 class SettingsStorageFactory;
 class ValueStoreCache;
@@ -90,6 +92,13 @@ class ExtensionsAPIClient {
       const RulesRegistry::WebViewKey& webview_key,
       const std::string& event_name);
 
+  // Creates a delegate for WebRequestEventRouter.
+  virtual WebRequestEventRouterDelegate* CreateWebRequestEventRouterDelegate()
+      const;
+
+  // Creates extra parameters for a given request, i.e., tab_id, and window_id.
+  virtual ExtraRequestParams* CreateExtraRequestParams() const;
+
   // NOTE: If this interface gains too many methods (perhaps more than 20) it
   // should be split into one interface per API.
 };