update all json files

etc/api/adsensehost/v4.1/adsensehost-api.json

@@ -15,7 +15,6 @@
     "description": "Generates performance reports, generates ad codes, and provides publisher management capabilities for AdSense Hosts.", 
     "discoveryVersion": "v1", 
     "documentationLink": "https://developers.google.com/adsense/host/", 
-    "etag": "\"9eZ1uxVRThTDhLJCZHhqs3eQWz4/JG41eEpvCwrEtxQxrYypFYYmUHY\"", 
     "icons": {
         "x16": "https://www.google.com/images/icons/product/adsense-16.png", 
         "x32": "https://www.google.com/images/icons/product/adsense-32.png"
@@ -633,6 +632,11 @@
                         "websiteUrl"
                     ], 
                     "parameters": {
+                        "callbackUrl": {
+                            "description": "The URL to redirect the user to once association is completed. It receives a token parameter that can then be used to retrieve the associated account.", 
+                            "location": "query", 
+                            "type": "string"
+                        }, 
                         "productCode": {
                             "description": "Products to associate with the user.", 
                             "enum": [
@@ -1072,7 +1076,7 @@
             }
         }
     }, 
-    "revision": "20190703", 
+    "revision": "20200407", 
     "rootUrl": "https://www.googleapis.com/", 
     "schemas": {
         "Account": {