Revert of Refactoring of Cast-related crypto code

chrome/common/extensions/api/networking_private.json

Index: chrome/common/extensions/api/networking_private.json
diff --git a/chrome/common/extensions/api/networking_private.json b/chrome/common/extensions/api/networking_private.json
index 8e734631a410b3a987c2d93e1ea0e1890e229f1f..bac9fea39cf707873c7691767dfe17b60f82d8e9 100644
--- a/chrome/common/extensions/api/networking_private.json
+++ b/chrome/common/extensions/api/networking_private.json
@@ -27,17 +27,11 @@
         "properties": {
           "certificate": {
             "type": "string",
-            "description": "A string containing a PEM-encoded (including the \"BEGIN CERTIFICATE\" header and \"END CERTIFICATE\" footer) X.509 certificate for use in verifying the signed data."
-          },
-          "intermediateCertificates": {
-            "type": "array",
-            "items": { "type": "string" },
-            "optional": true,
-            "description": "An array of PEM-encoded X.509 intermediate certificate authority certificates. Each PEM-encoded certificate is expected to have the \"BEGIN CERTIFICATE\" header and \"END CERTIFICATE\" footer."
+            "description": "A string containing a PEM-encoded X.509 certificate for use in verifying the signed data."
           },
           "publicKey": {
             "type": "string",
-            "description": "A string containing a Base64-encoded RSAPublicKey ASN.1 structure, representing the public key to be used by verifyAndEncryptCredentials and verifyAndEncryptData methods."
+            "description": "A string containing a PEM-encoded RSA public key to be used to compare with the one in signedData"
           },
           "nonce": {
             "type": "string",