Updates SpdyHeaderBlock's hashing and equality types to make the data structure case-insensitive with respect to keys.

gfe-relnote: Makes SpdyHeaderBlock case-insensitive with respect to keys. Not possible to protect.
PiperOrigin-RevId: 288035700
Change-Id: Ifdff6aed6e65f96c60e3ef9d164f7899a0a23baa
diff --git a/spdy/core/spdy_header_block_test.cc b/spdy/core/spdy_header_block_test.cc
index aad264c..806e89e 100644
--- a/spdy/core/spdy_header_block_test.cc
+++ b/spdy/core/spdy_header_block_test.cc
@@ -220,13 +220,14 @@
   SpdyHeaderBlock block;
   block["Foo"] = "foo";
   block.AppendValueOrAddHeader("Foo", "bar");
-  EXPECT_EQ(block.end(), block.find("foo"));
+  EXPECT_NE(block.end(), block.find("foo"));
   EXPECT_EQ(Pair("Foo", std::string("foo\0bar", 7)), *block.find("Foo"));
 
-  // The map is case sensitive, so both "Foo" and "foo" can be present.
+  // The map is case insensitive, so updating "foo" modifies the entry
+  // previously added.
   block.AppendValueOrAddHeader("foo", "baz");
-  EXPECT_THAT(block, ElementsAre(Pair("Foo", std::string("foo\0bar", 7)),
-                                 Pair("foo", "baz")));
+  EXPECT_THAT(block,
+              ElementsAre(Pair("Foo", std::string("foo\0bar\0baz", 11))));
 }
 
 namespace {