Fix QUICHE merge issue in test

gfe-relnote: n/a, test-only
PiperOrigin-RevId: 286096920
Change-Id: Id6aa57a42beafad0fc1a17e73255685fb23290e8

spdy/core/hpack/hpack_encoder_test.cc

diff --git a/spdy/core/hpack/hpack_encoder_test.cc b/spdy/core/hpack/hpack_encoder_test.cc
index a878866..b905214 100644
--- a/spdy/core/hpack/hpack_encoder_test.cc
+++ b/spdy/core/hpack/hpack_encoder_test.cc
@@ -326,7 +326,7 @@
   headers[static_->name()] = static_->value();
   CompareWithExpectedEncoding(headers);
 
-  EXPECT_EQ(0, peer_.table_peer().dynamic_entries()->size());
+  EXPECT_EQ(0u, peer_.table_peer().dynamic_entries()->size());
 }
 
 TEST_P(HpackEncoderTest, SingleLiteralWithIndexName) {