Fix chromium compile issues: comparison of integers of different signs: 'const int' and 'const unsigned long'.

gfe-relnote: n/a, test only change
PiperOrigin-RevId: 284907367
Change-Id: Ic800078422d2f16a437b98ad21d499304e09dfc4
diff --git a/spdy/core/spdy_simple_arena_test.cc b/spdy/core/spdy_simple_arena_test.cc
index b0da896..35c84f1 100644
--- a/spdy/core/spdy_simple_arena_test.cc
+++ b/spdy/core/spdy_simple_arena_test.cc
@@ -18,7 +18,7 @@
 
 TEST(SpdySimpleArenaTest, NoAllocationOnConstruction) {
   SpdySimpleArena arena(kDefaultBlockSize);
-  EXPECT_EQ(0, arena.status().bytes_allocated());
+  EXPECT_EQ(0u, arena.status().bytes_allocated());
 }
 
 TEST(SpdySimpleArenaTest, Memdup) {