Implement basic classes for HPACK (HTTP/2 compression)

net/net.gyp

Index: net/net.gyp
diff --git a/net/net.gyp b/net/net.gyp
index 808261d8d0ee30476a0e314ed96afa1ddeb388c3..31c60818e39102c72e3f1510ce57a88b32718f21 100644
--- a/net/net.gyp
+++ b/net/net.gyp
@@ -995,6 +995,14 @@
         'socket_stream/socket_stream_metrics.h',
         'spdy/buffered_spdy_framer.cc',
         'spdy/buffered_spdy_framer.h',
+        'spdy/hpack_encoding_context.cc',
+        'spdy/hpack_encoding_context.h',
+        'spdy/hpack_entry.cc',
+        'spdy/hpack_entry.h',
+        'spdy/hpack_header_table.cc',
+        'spdy/hpack_header_table.h',
+        'spdy/hpack_string_util.cc',
+        'spdy/hpack_string_util.h',
         'spdy/spdy_bitmasks.h',
         'spdy/spdy_buffer.cc',
         'spdy/spdy_buffer.h',
@@ -1922,6 +1930,10 @@
         'socket_stream/socket_stream_metrics_unittest.cc',
         'socket_stream/socket_stream_unittest.cc',
         'spdy/buffered_spdy_framer_unittest.cc',
+        'spdy/hpack_encoding_context_test.cc',
+        'spdy/hpack_entry_test.cc',
+        'spdy/hpack_header_table_test.cc',
+        'spdy/hpack_string_util_test.cc',
         'spdy/spdy_buffer_unittest.cc',
         'spdy/spdy_frame_builder_test.cc',
         'spdy/spdy_frame_reader_test.cc',