Switch DownloadProtectionServiceTest to use pre-generated certs instead of creating them each time.

chrome/test/data/safe_browsing/download_protection/test_ou.pem

Index: chrome/test/data/safe_browsing/download_protection/test_ou.pem
diff --git a/chrome/test/data/safe_browsing/download_protection/test_ou.pem b/chrome/test/data/safe_browsing/download_protection/test_ou.pem
new file mode 100644
index 0000000000000000000000000000000000000000..895021165eec3ab17d6845a05fa9ff6268111a81
--- /dev/null
+++ b/chrome/test/data/safe_browsing/download_protection/test_ou.pem
@@ -0,0 +1,44 @@
+Certificate:
+    Data:
+        Version: 3 (0x2)
+        Serial Number:
+            72:15:57:d2:b6:d2:36:b6:47:33:5b:1b:40:99:ce:3b
+        Signature Algorithm: sha1WithRSA
+        Issuer: CN=Root Agency
+        Validity
+            Not Before: Dec  2 04:32:19 2011 GMT
+            Not After : Dec 31 23:59:59 2039 GMT
+        Subject: OU=unit
+        Subject Public Key Info:
+            Public Key Algorithm: rsaEncryption
+                Public-Key: (1024 bit)
+                Modulus:
+                    00:d6:6e:ed:69:7d:89:b1:cb:74:66:1a:66:69:77:
+                    85:0e:f1:67:2e:4c:21:fa:40:57:44:24:c2:e2:25:
+                    9f:3f:a8:26:73:54:8d:86:40:6e:f7:e1:04:7d:ff:
+                    a3:fc:47:b0:23:03:98:7f:c2:b6:bc:43:ef:46:26:
+                    bf:2b:e8:7c:e4:a0:de:34:68:da:fa:9f:cb:9e:92:
+                    21:fb:a6:77:0e:b7:6f:15:9f:60:2d:0d:8c:a0:81:
+                    88:42:eb:b1:36:92:59:af:dc:0a:f7:8d:8f:dc:55:
+                    b5:90:d1:03:37:d2:1c:14:cc:5b:21:ac:0d:08:7d:
+                    95:f3:1f:b2:d5:3d:9b:a7:2d
+                Exponent: 65537 (0x10001)
+        X509v3 extensions:
+            2.5.29.1: 
+                0>.....-...O..a!..dc..0.1.0...U....Root Agency...7l...d......\5.
+    Signature Algorithm: sha1WithRSA
+        65:86:ee:e5:09:4c:f0:89:dd:fa:ed:43:8b:ba:03:79:2d:c2:
+        12:c8:72:35:f1:62:ef:43:3c:4a:8e:69:e1:69:df:d9:0d:f8:
+        99:60:3d:a7:f1:ed:0a:37:bb:4b:a8:b8:2d:e6:e6:27:0a:d8:
+        da:dd:b1:b3:18:1f:7b:c6:93:8b
+-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----