Introduce WebViewGuestDelegate.

extensions/browser/guest_view/web_view/web_view_guest_delegate.cc

Index: extensions/browser/guest_view/web_view/web_view_guest_delegate.cc
diff --git a/extensions/browser/api/storage/value_store_cache.cc b/extensions/browser/guest_view/web_view/web_view_guest_delegate.cc
similarity index 55%
copy from extensions/browser/api/storage/value_store_cache.cc
copy to extensions/browser/guest_view/web_view/web_view_guest_delegate.cc
index 04ea418113cb4d2d5e841bd3c3597e74df156ffc..d651212d57ef620003e158f1e410209ca7c5e85f 100644
--- a/extensions/browser/api/storage/value_store_cache.cc
+++ b/extensions/browser/guest_view/web_view/web_view_guest_delegate.cc
@@ -2,12 +2,14 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "extensions/browser/api/storage/value_store_cache.h"
+#include "extensions/browser/guest_view/web_view/web_view_guest_delegate.h"
 
 namespace extensions {
 
-ValueStoreCache::~ValueStoreCache() {}
+WebViewGuestDelegate::WebViewGuestDelegate() {
+}
 
-void ValueStoreCache::ShutdownOnUI() {}
+WebViewGuestDelegate::~WebViewGuestDelegate() {
+}
 
 }  // namespace extensions