Add GN For hpack fuzzing utilities and net_perftests.

BUILD.gn

 # Copyright (c) 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # This is the root build file for GN. GN will start processing by loading this
 # file, and recursively load all dependencies until all dependencies are either
 # resolved or known not to exist (which will cause the build to fail). So if
 # you add a new build file, there must be some path of dependencies from this
 # file to your new one or GN won't know about it.
 
@@ skipping 49 matching lines @@
     "//google_apis/gcm",
     "//ipc",
     "//ipc/mojo",
     "//jingle:notifier",
     "//media",
     "//media/blink",
     "//media/cast",
     "//media/mojo",
     "//mojo",
     "//net",
+    "//net:hpack_example_generator",
+    "//net:hpack_fuzz_wrapper",

[mmenke, 2015/02/19 18:58:00]

Should this include net_perftests or hpack_fuzz_mutator?

     "//pdf",
     "//ppapi/examples",
     "//printing",
     "//remoting/client/plugin",
     "//sandbox",
     "//sdch",
     "//skia",
     "//storage/browser",
     "//sql",
     "//sync",
@@ skipping 215 matching lines @@
       "//ui/views",
       "//ui/views/controls/webview",
       "//ui/web_dialogs",
     ]
   }
 
   if (is_mac || is_ios) {
     deps -= [ "//ui/touch_selection" ]
   }
 }