Sort SPDY flags alphabetically and move to net namespace.

Review-Url: https://codereview.chromium.org/2339473005
Cr-Commit-Position: refs/heads/master@{#418751}

net/spdy/spdy_flags.cc

@@ -4,8 +4,7 @@
 
 #include "net/spdy/spdy_flags.h"
 
-// Use NestedSpdyFramerDecoder.
-bool FLAGS_use_nested_spdy_framer_decoder = false;
+namespace net {
 
 // If true, SpdyFramer uses the new visitor methods OnHeaderFrameStart and
 // OnHeaderFrameEnd.  Fourth attempt.
@@ -13,3 +12,8 @@ bool FLAGS_chromium_http2_flag_spdy_framer_use_new_methods4 = true;
 
 // Use SpdyHeaderBlock::AppendValueOrAddHeader when adding to headers.
 bool FLAGS_chromium_http2_flag_use_new_spdy_header_block_header_joining = true;
+
+// Use NestedSpdyFramerDecoder.
+bool FLAGS_use_nested_spdy_framer_decoder = false;
+
+}  // namespace net

net/spdy/spdy_flags.h

@@ -7,10 +7,14 @@
 
 #include "net/base/net_export.h"
 
-NET_EXPORT_PRIVATE extern bool FLAGS_use_nested_spdy_framer_decoder;
+namespace net {
+
 NET_EXPORT_PRIVATE extern bool
     FLAGS_chromium_http2_flag_spdy_framer_use_new_methods4;
 NET_EXPORT_PRIVATE extern bool
     FLAGS_chromium_http2_flag_use_new_spdy_header_block_header_joining;
+NET_EXPORT_PRIVATE extern bool FLAGS_use_nested_spdy_framer_decoder;
+
+}  // namespace net
 
 #endif  // NET_SPDY_SPDY_FLAGS_H_