Add CertIssuerSourceAia: authorityInfoAccess fetching for CertPathBuilder.

net/data/cert_issuer_source_aia_unittest/i2.pem

Index: net/data/cert_issuer_source_aia_unittest/i2.pem
diff --git a/net/data/cert_issuer_source_aia_unittest/i2.pem b/net/data/cert_issuer_source_aia_unittest/i2.pem
new file mode 100644
index 0000000000000000000000000000000000000000..1fde28bc961d6322825b207a4269342ff6577d31
--- /dev/null
+++ b/net/data/cert_issuer_source_aia_unittest/i2.pem
@@ -0,0 +1,88 @@
+Certificate:
+    Data:
+        Version: 3 (0x2)
+        Serial Number: 3 (0x3)
+    Signature Algorithm: sha256WithRSAEncryption
+        Issuer: CN=Root
+        Validity
+            Not Before: Jan  1 12:00:00 2015 GMT
+            Not After : Jan  1 12:00:00 2016 GMT
+        Subject: CN=I
+        Subject Public Key Info:
+            Public Key Algorithm: rsaEncryption
+                Public-Key: (2048 bit)
+                Modulus:
+                    00:d5:53:f7:08:59:cb:f1:35:f2:71:24:70:49:7f:
+                    f6:d7:3d:00:92:3f:cc:18:f7:1b:07:3c:89:0a:4c:
+                    f7:c4:4b:30:57:ce:88:d9:c9:5f:61:47:b9:7e:44:
+                    34:2e:a5:1e:6b:f8:09:94:ae:b1:bb:0d:f3:11:33:
+                    72:ca:00:70:5f:87:e0:da:4f:c8:ab:e3:f2:35:2a:
+                    e6:a6:50:c5:9d:67:96:f3:9e:6e:6a:2a:34:fa:12:
+                    4c:a9:56:29:76:8c:3f:e2:5e:5f:ad:95:66:3e:d2:
+                    2f:9e:ff:1c:85:23:30:65:0e:0a:46:ac:dc:cf:ee:
+                    bc:87:d5:97:b9:1e:4e:7d:db:d8:b0:30:64:b2:d2:
+                    5c:91:2f:90:23:84:fb:9c:94:73:97:e1:16:68:30:
+                    83:d5:14:e5:24:9e:53:c7:97:e1:f3:12:57:a8:e0:
+                    71:1e:db:3c:c3:9b:b1:88:a2:4d:12:17:08:98:ec:
+                    ed:3d:bb:74:0a:66:75:6d:a1:6b:ce:93:1e:98:83:
+                    09:19:05:a3:62:71:fa:e8:88:53:48:9f:51:42:3e:
+                    0a:f4:b1:84:cc:75:3b:65:e4:b1:7a:72:d6:90:de:
+                    cd:5e:95:39:af:eb:7c:2b:09:16:dc:49:05:3c:70:
+                    a3:17:4a:89:9a:33:07:e3:8e:fd:84:fd:f7:9d:15:
+                    70:27
+                Exponent: 65537 (0x10001)
+        X509v3 extensions:
+            X509v3 Subject Key Identifier: 
+                4A:3F:36:DB:AC:83:60:8A:A2:E9:24:25:39:A0:47:00:C2:71:E3:FE
+            X509v3 Authority Key Identifier: 
+                keyid:25:D5:CC:4A:EA:CA:BD:2F:B6:F4:F5:65:FB:33:9F:06:66:95:10:6B
+
+            Authority Information Access: 
+                CA Issuers - URI:http://url-for-aia/Root.cer
+
+            X509v3 CRL Distribution Points: 
+
+                Full Name:
+                  URI:http://url-for-crl/Root.crl
+
+            X509v3 Key Usage: critical
+                Certificate Sign, CRL Sign
+            X509v3 Basic Constraints: critical
+                CA:TRUE
+    Signature Algorithm: sha256WithRSAEncryption
+         02:6f:8d:f0:ff:77:1a:c4:35:01:9c:18:04:80:a9:0a:1a:91:
+         6d:c6:2e:47:3b:7e:ad:01:c1:35:c7:f6:37:e7:a9:b2:89:91:
+         fb:4b:99:a2:e3:38:53:e5:23:f8:bf:c5:f6:d1:65:7f:b4:fe:
+         f5:ef:a4:61:ff:01:cd:5c:56:ce:f8:4d:3d:93:36:67:1e:d2:
+         eb:86:bc:59:c4:5e:ec:49:52:f4:b9:e0:d6:7b:75:aa:37:07:
+         47:49:7c:8b:43:1c:16:51:f3:b9:15:d5:6d:23:df:5e:61:b9:
+         d8:18:ec:25:79:4a:d7:f6:11:ea:03:ea:03:e2:a6:82:48:de:
+         ba:f3:3f:f0:96:00:63:bf:91:21:73:e2:ae:3f:ee:b2:d0:7f:
+         db:a1:9a:a3:e6:bd:df:8c:ed:1c:26:bc:1f:e3:47:3c:a1:57:
+         bb:30:7f:f2:c2:87:5e:b5:5b:9a:47:56:ff:02:27:30:c2:02:
+         18:fb:48:b0:e8:47:d2:dd:a6:a2:8f:c2:d6:2d:51:c7:b6:9e:
+         56:16:dc:fe:0d:29:d6:09:84:7f:2f:5b:5d:46:c5:90:ef:b9:
+         9b:17:9f:bb:c4:f4:53:c2:74:83:5a:25:e0:81:43:c4:7e:f2:
+         91:82:93:e0:05:95:49:92:3f:78:00:18:7b:db:67:17:8e:3c:
+         93:eb:56:81
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----