Implement HasPermission() method in PermissionService.

content/public/browser/content_browser_client.h

Index: content/public/browser/content_browser_client.h
diff --git a/content/public/browser/content_browser_client.h b/content/public/browser/content_browser_client.h
index c44788bdeab2db9697116dce9e805bb2e4a22994..a9335e962c3ea30ff16a945715b7c1b569238aa4 100644
--- a/content/public/browser/content_browser_client.h
+++ b/content/public/browser/content_browser_client.h
@@ -20,6 +20,7 @@
 #include "content/public/browser/permission_type.h"
 #include "content/public/common/content_client.h"
 #include "content/public/common/media_stream_request.h"
+#include "content/public/common/permission_status.mojom.h"
 #include "content/public/common/resource_type.h"
 #include "content/public/common/socket_permission_request.h"
 #include "content/public/common/window_container_type.h"
@@ -453,6 +454,12 @@ class CONTENT_EXPORT ContentBrowserClient {
                                        const GURL& frame_url,
                                        const GURL& main_frame_url) {}
 
+  virtual PermissionStatus GetPermissionStatus(
+      PermissionType permission,
+      BrowserContext* browser_context,
+      const GURL& requesting_origin,
+      const GURL& embedding_origin);
+
   // Returns true if the given page is allowed to open a window of the given
   // type. If true is returned, |no_javascript_access| will indicate whether
   // the window that is created should be scriptable/in the same process.