Remove SPDY/2 code.

net/spdy/spdy_frame_builder_test.cc

Index: net/spdy/spdy_frame_builder_test.cc
diff --git a/net/spdy/spdy_frame_builder_test.cc b/net/spdy/spdy_frame_builder_test.cc
index e352303bf364206527ecbf5c25a4ae9ea082304a..70b9374d8b8279c1601714d448725a31d7f959e4 100644
--- a/net/spdy/spdy_frame_builder_test.cc
+++ b/net/spdy/spdy_frame_builder_test.cc
@@ -18,11 +18,10 @@ class SpdyFrameBuilderTest : public ::testing::TestWithParam<SpdyMajorVersion> {
   SpdyMajorVersion spdy_version_;
 };
 
-// All tests are run with three different SPDY versions: SPDY/2, SPDY/3 and
-// HTTP/2.
+// All tests are run with SPDY/3 and HTTP/2.
 INSTANTIATE_TEST_CASE_P(SpdyFrameBuilderTests,
                         SpdyFrameBuilderTest,
-                        ::testing::Values(SPDY2, SPDY3, HTTP2));
+                        ::testing::Values(SPDY3, HTTP2));
 
 TEST_P(SpdyFrameBuilderTest, GetWritableBuffer) {
   const size_t builder_size = 10;