Create a Perspective enum to use instead of a bool is_server to improve

net/quic/quic_headers_stream.cc

Index: net/quic/quic_headers_stream.cc
diff --git a/net/quic/quic_headers_stream.cc b/net/quic/quic_headers_stream.cc
index b40142db16605874f568b555e1d94f0dfe3643b9..435267b7d67e7c76524bb80e14c8e055faf0b9f3 100644
--- a/net/quic/quic_headers_stream.cc
+++ b/net/quic/quic_headers_stream.cc
@@ -222,7 +222,7 @@ size_t QuicHeadersStream::WriteHeaders(
     QuicAckNotifier::DelegateInterface* ack_notifier_delegate) {
   scoped_ptr<SpdySerializedFrame> frame;
   if (spdy_framer_->protocol_version() == SPDY3) {
-    if (session()->is_server()) {
+    if (session()->perspective() == Perspective::IS_SERVER) {
       SpdySynReplyIR syn_reply(stream_id);
       syn_reply.set_name_value_block(headers);
       syn_reply.set_fin(fin);
@@ -238,7 +238,7 @@ size_t QuicHeadersStream::WriteHeaders(
     SpdyHeadersIR headers_frame(stream_id);
     headers_frame.set_name_value_block(headers);
     headers_frame.set_fin(fin);
-    if (!session()->is_server()) {
+    if (session()->perspective() == Perspective::IS_CLIENT) {
       headers_frame.set_has_priority(true);
       headers_frame.set_priority(priority);
     }
@@ -275,7 +275,7 @@ void QuicHeadersStream::InitializeFramer(QuicVersion version) {
 void QuicHeadersStream::OnSynStream(SpdyStreamId stream_id,
                                     SpdyPriority priority,
                                     bool fin) {
-  if (!session()->is_server()) {
+  if (session()->perspective() == Perspective::IS_CLIENT) {
     CloseConnectionWithDetails(
         QUIC_INVALID_HEADERS_STREAM_DATA,
         "SPDY SYN_STREAM frame received at the client");
@@ -288,7 +288,7 @@ void QuicHeadersStream::OnSynStream(SpdyStreamId stream_id,
 }
 
 void QuicHeadersStream::OnSynReply(SpdyStreamId stream_id, bool fin) {
-  if (session()->is_server()) {
+  if (session()->perspective() == Perspective::IS_SERVER) {
     CloseConnectionWithDetails(
         QUIC_INVALID_HEADERS_STREAM_DATA,
         "SPDY SYN_REPLY frame received at the server");