GN configs for ipc fuzzer.

ipc/BUILD.gn

Index: ipc/BUILD.gn
diff --git a/ipc/BUILD.gn b/ipc/BUILD.gn
index 520af761db7b6e7bab5bfca0af39c7c9c14496fc..9964e590a4616f27ffe6e3affe9826bf67bbab42 100644
--- a/ipc/BUILD.gn
+++ b/ipc/BUILD.gn
@@ -4,6 +4,7 @@
 
 import("//build/config/nacl/config.gni")
 import("//testing/test.gni")
+import("//tools/ipc_fuzzer/ipc_fuzzer.gni")
 
 assert(!is_ios)
 
@@ -141,6 +142,10 @@ component("ipc") {
     # On Mac MachPortAttachmentMac needs to generate random IDs.
     deps += [ "//crypto" ]
   }
+
+  if (enable_ipc_fuzzer) {
+    public_configs = [ "//tools/ipc_fuzzer:ipc_fuzzer_config" ]
+  }
 }
 
 # This is provided as a separate target so other targets can provide param