Adds a function for encoding a Merkle tree leaf in TLS wire format.

net/test/ct_test_util.h

Index: net/test/ct_test_util.h
diff --git a/net/test/ct_test_util.h b/net/test/ct_test_util.h
index d3df6e62d9baa1ec0174620739833549f7a35c92..649b87c0824dcff28d707bbcd5555f06940caa98 100644
--- a/net/test/ct_test_util.h
+++ b/net/test/ct_test_util.h
@@ -21,6 +21,7 @@ namespace ct {
 struct CTVerifyResult;
 struct DigitallySigned;
 struct LogEntry;
+struct MerkleTreeLeaf;
 struct SignedTreeHead;
 
 // Note: unless specified otherwise, all test data is taken from Certificate
@@ -29,6 +30,9 @@ struct SignedTreeHead;
 // Fills |entry| with test data for an X.509 entry.
 void GetX509CertLogEntry(LogEntry* entry);
 
+// Fills |tree_leaf| with test data for an X.509 Merkle tree leaf.
+void GetX509CertTreeLeaf(MerkleTreeLeaf* tree_leaf);
+
 // Returns a DER-encoded X509 cert. The SCT provided by
 // GetX509CertSCT is signed over this certificate.
 std::string GetDerEncodedX509Cert();
@@ -36,6 +40,9 @@ std::string GetDerEncodedX509Cert();
 // Fills |entry| with test data for a Precertificate entry.
 void GetPrecertLogEntry(LogEntry* entry);
 
+// Fills |tree_leaf| with test data for a Precertificate Merkle tree leaf.
+void GetPrecertTreeLeaf(MerkleTreeLeaf* tree_leaf);
+
 // Returns the binary representation of a test DigitallySigned
 std::string GetTestDigitallySigned();