Restructure the ipc_fuzzer directory.

tools/ipc_fuzzer/fuzzer/fuzzer.gyp

Index: tools/ipc_fuzzer/fuzzer/fuzzer.gyp
diff --git a/tools/ipc_fuzzer/mutate/mutate.gyp b/tools/ipc_fuzzer/fuzzer/fuzzer.gyp
similarity index 73%
copy from tools/ipc_fuzzer/mutate/mutate.gyp
copy to tools/ipc_fuzzer/fuzzer/fuzzer.gyp
index a21396b3b62b5da1210d88c823bca1cd9f0f0b30..909108d3c2ee839a84ac14716aa148966148deef 100644
--- a/tools/ipc_fuzzer/mutate/mutate.gyp
+++ b/tools/ipc_fuzzer/fuzzer/fuzzer.gyp
@@ -41,22 +41,5 @@
         'USE_CUPS',
       ],
     },
-    {
-      'target_name': 'ipc_message_util',
-      'type': 'executable',
-      'dependencies': [
-        '../../../third_party/re2/re2.gyp:re2',
-        '../message_lib/message_lib.gyp:ipc_message_lib',
-      ],
-      'sources': [
-        'message_util.cc',
-      ],
-      'include_dirs': [
-        '../../..',
-      ],
-      'defines': [
-        'USE_CUPS',
-      ],
-    },
   ],
 }