Reintroduce plumbing for user gesture into permission system.

chrome/browser/permissions/permission_context_base.h

Index: chrome/browser/permissions/permission_context_base.h
diff --git a/chrome/browser/permissions/permission_context_base.h b/chrome/browser/permissions/permission_context_base.h
index e7257edde83178a974f549bdabc4e44371998573..d8ca742f24114a52e00ecf93d43f16fc844430c0 100644
--- a/chrome/browser/permissions/permission_context_base.h
+++ b/chrome/browser/permissions/permission_context_base.h
@@ -79,6 +79,7 @@ class PermissionContextBase : public KeyedService {
   virtual void RequestPermission(content::WebContents* web_contents,
                                  const PermissionRequestID& id,
                                  const GURL& requesting_frame,
+                                 bool user_gesture,
                                  const BrowserPermissionCallback& callback);
 
   // Returns whether the permission has been granted, denied...
@@ -108,6 +109,7 @@ class PermissionContextBase : public KeyedService {
                                 const PermissionRequestID& id,
                                 const GURL& requesting_origin,
                                 const GURL& embedding_origin,
+                                bool user_gesture,
                                 const BrowserPermissionCallback& callback);
 
   // Called when permission is granted without interactively asking the user.