[Navigation Experiment] Add WKBasedNavigationManagerImpl.

ios/web/navigation/navigation_manager_delegate.h

Index: ios/web/navigation/navigation_manager_delegate.h
diff --git a/ios/web/navigation/navigation_manager_delegate.h b/ios/web/navigation/navigation_manager_delegate.h
index 90c7675c057dbe66f4fb3fee2fe05244a4faba5d..7c6dfd02a84e8aa46d02f09913509f8cdc7ff8b3 100644
--- a/ios/web/navigation/navigation_manager_delegate.h
+++ b/ios/web/navigation/navigation_manager_delegate.h
@@ -13,6 +13,7 @@ namespace web {
 
 struct LoadCommittedDetails;
 class WebState;
+class WebViewNavigationProxy;
 
 // Delegate for NavigationManager to hand off parts of the navigation flow.
 class NavigationManagerDelegate {
@@ -42,6 +43,9 @@ class NavigationManagerDelegate {
 
   // Returns the WebState associated with this delegate.
   virtual WebState* GetWebState() = 0;
+
+  // Returns the main WKWebView used to display web content.

[Eugene But (OOO till 7-30), 2017/06/29 01:48:19]

Update comment?

[danyao, 2017/06/29 16:05:25]

Done.

+  virtual WebViewNavigationProxy* GetWebViewNavigationProxy() const = 0;
 };
 
 }  // namespace web