Reintroduce plumbing for user gesture into permission system.

content/public/browser/permission_manager.h

Index: content/public/browser/permission_manager.h
diff --git a/content/public/browser/permission_manager.h b/content/public/browser/permission_manager.h
index c783c33a63e622e35aeecc438500141f90601049..dbf197b9d989087453e01c1d038b96579693e9b8 100644
--- a/content/public/browser/permission_manager.h
+++ b/content/public/browser/permission_manager.h
@@ -37,6 +37,7 @@ class CONTENT_EXPORT PermissionManager {
       PermissionType permission,
       RenderFrameHost* render_frame_host,
       const GURL& requesting_origin,
+      bool user_gesture,
       const base::Callback<void(blink::mojom::PermissionStatus)>& callback) = 0;
 
   // Requests multiple permissions on behalf of a frame identified by
@@ -53,6 +54,7 @@ class CONTENT_EXPORT PermissionManager {
       const std::vector<PermissionType>& permission,
       RenderFrameHost* render_frame_host,
       const GURL& requesting_origin,
+      bool user_gesture,
       const base::Callback<void(
           const std::vector<blink::mojom::PermissionStatus>&)>& callback) = 0;