Implement PushManager#hasPermission

chrome/browser/content_settings/permission_context_base.h

Index: chrome/browser/content_settings/permission_context_base.h
diff --git a/chrome/browser/content_settings/permission_context_base.h b/chrome/browser/content_settings/permission_context_base.h
index 48fcac8ce7bca3fa842952276d509c09560959ab..5a4e62d59d087bee1e88369d9cd1543bba7e0dbe 100644
--- a/chrome/browser/content_settings/permission_context_base.h
+++ b/chrome/browser/content_settings/permission_context_base.h
@@ -10,6 +10,7 @@
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "chrome/browser/ui/website_settings/permission_bubble_request.h"
+#include "components/content_settings/core/common/content_settings.h"
 #include "components/content_settings/core/common/content_settings_types.h"
 #include "components/keyed_service/core/keyed_service.h"
 #include "url/gurl.h"
@@ -63,6 +64,11 @@ class PermissionContextBase : public KeyedService {
                                  bool user_gesture,
                                  const BrowserPermissionCallback& callback);
 
+  // Returns whether the permission has been granted, denied...
+  virtual ContentSetting GetPermissionStatus(
+      const GURL& requesting_origin,
+      const GURL& embedding_origin) const;
+
   // Withdraw an existing permission request, no op if the permission request
   // was already cancelled by some other means.
   virtual void CancelPermissionRequest(content::WebContents* web_contents,