update_engine: Clean up angle brackets in template types.

C++11 no longer has the angle bracket pitfall in template types.

BUG=None
TEST=`FEATURES=test emerge-$BOARD update_engine`

Change-Id: I0168b9f208ad8e62ae614b8a3b8bcf31c58fa9f2
Reviewed-on: https://chromium-review.googlesource.com/219203
Commit-Queue: Ben Chan <benchan@chromium.org>
Tested-by: Ben Chan <benchan@chromium.org>
Reviewed-by: Alex Vakulenko <avakulenko@chromium.org>
diff --git a/delta_performer_unittest.cc b/delta_performer_unittest.cc
index 6df65e4..9292cab 100644
--- a/delta_performer_unittest.cc
+++ b/delta_performer_unittest.cc
@@ -146,7 +146,7 @@
 static bool InsertSignaturePlaceholder(int signature_size,
                                        const string& payload_path,
                                        uint64_t* out_metadata_size) {
-  vector<vector<char> > signatures;
+  vector<vector<char>> signatures;
   signatures.push_back(vector<char>(signature_size, 0));
 
   return PayloadSigner::AddSignatureToPayload(
@@ -170,7 +170,7 @@
                                       &signature));
   ASSERT_TRUE(PayloadSigner::AddSignatureToPayload(
       payload_path,
-      vector<vector<char> >(1, signature),
+      vector<vector<char>>(1, signature),
       payload_path,
       out_metadata_size));
   EXPECT_TRUE(PayloadVerifier::VerifySignedPayload(