Updated the <webview> loadabort documentatin with the actual "reason" strings that are currently us…

chrome/common/extensions/api/webview_tag.json

Index: chrome/common/extensions/api/webview_tag.json
diff --git a/chrome/common/extensions/api/webview_tag.json b/chrome/common/extensions/api/webview_tag.json
index 35aa6c508f7d393710be050c6262c9536e6df073..a55c13a1ac39408dc376b3883143498bc9edde42 100644
--- a/chrome/common/extensions/api/webview_tag.json
+++ b/chrome/common/extensions/api/webview_tag.json
@@ -791,9 +791,9 @@
           },
           {
             "name": "reason",
-            "description": "String indicating what type of abort occurred. This string is <em>not</em> guaranteed to remain backwards compatible between releases. You must not parse and act based upon its content.",
+            "description": "String indicating what type of abort occurred. This string is <em>not</em> guaranteed to remain backwards compatible between releases. You must not parse and act based upon its content. It is also possible that, in some cases, an error not listed here could be reported.",
             "type": "string",
-            "enum": ["networkError", "download", "canceled", "sslError", "safeBrowsingError"]
+            "enum": ["ERR_ABORTED", "ERR_BLOCKED_BY_CLIENT", "ERR_ADDRESS_UNREACHABLE", "ERR_EMPTY_RESPONSE", "ERR_FILE_NOT_FOUND", "ERR_UNKNOWN_URL_SCHEME"]
           }
         ]
       },