Add CertIssuerSourceAia: authorityInfoAccess fetching for CertPathBuilder.

net/data/cert_issuer_source_aia_unittest/i3.pem

Index: net/data/cert_issuer_source_aia_unittest/i3.pem
diff --git a/net/data/cert_issuer_source_aia_unittest/i3.pem b/net/data/cert_issuer_source_aia_unittest/i3.pem
new file mode 100644
index 0000000000000000000000000000000000000000..10c274485edf679d88fd7f5d542510670bcb3782
--- /dev/null
+++ b/net/data/cert_issuer_source_aia_unittest/i3.pem
@@ -0,0 +1,88 @@
+Certificate:
+    Data:
+        Version: 3 (0x2)
+        Serial Number: 4 (0x4)
+    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
+         a4:ff:be:2a:45:8b:23:7b:46:c9:d7:65:d2:04:dc:99:ae:54:
+         02:61:78:dd:7d:5d:60:33:cb:42:01:d2:d4:f8:9e:eb:2a:3d:
+         51:48:83:65:54:62:0e:2b:a7:44:2f:d9:e6:6f:0e:94:b9:b8:
+         4f:ca:c0:a0:13:34:86:49:30:c9:5a:8b:58:37:71:de:a4:a4:
+         b6:29:2a:4f:10:87:c5:1d:68:67:22:29:2f:ec:c3:d8:f0:78:
+         0b:98:14:50:1c:11:bf:5d:b2:98:fb:ba:c2:96:30:9d:0c:58:
+         3e:d4:62:d6:0a:ef:ac:5a:c2:d2:f3:9f:1a:91:90:7e:e7:b4:
+         b5:6f:9d:3c:06:eb:9d:d7:d0:f6:a2:93:30:b4:84:ef:a8:af:
+         10:3c:3d:29:85:5d:e0:2b:41:16:ec:3a:99:2c:26:b3:a3:0b:
+         b1:b4:79:29:b0:82:88:73:ca:07:e2:e4:45:3d:e1:63:91:c0:
+         2a:85:58:ef:0b:86:c7:52:f2:16:c8:42:b8:c2:20:16:bc:57:
+         3b:5d:71:44:e3:5a:35:32:8f:0e:22:89:05:75:5a:1f:c4:cc:
+         e4:1d:81:c3:65:95:09:07:2e:67:38:43:2e:85:af:15:79:90:
+         3d:93:fb:f6:12:71:46:29:9f:1f:be:cb:46:28:eb:c0:47:07:
+         08:cd:4e:63
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----