Combine traits for IPC mutation and generation fuzzing plus other refactoring.

tools/ipc_fuzzer/mutate/mutate.gyp

 # Copyright 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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'targets': [
     {
-      'target_name': 'ipc_fuzzer_mutate',
-      'type': 'executable',
+      'target_name': 'ipc_fuzzer_lib',
+      'type': 'static_library',
       'dependencies': [
         '../message_lib/message_lib.gyp:ipc_message_lib',
       ],
       'sources': [
-        'mutate.cc',
+        'fuzzer.h',
+        'fuzzer.cc',
         'rand_util.h',
         'rand_util.cc',
       ],
       'conditions': [
         ['asan==1', {
           'cflags!': [
-            # Compiling mutate.cc with ASan takes too long, see
+            # Compiling fuzzer.cc with ASan takes too long, see
             # http://crbug.com/360158.
             '-fsanitize=address',
             '-fsanitize-coverage=<(sanitizer_coverage)',
           ],
         }],
       ],
       'include_dirs': [
         '../../..',
       ],
       'defines': [
         'USE_CUPS',
       ],
     },
     {
       'target_name': 'ipc_fuzzer_generate',
       'type': 'executable',
       'dependencies': [
-        '../message_lib/message_lib.gyp:ipc_message_lib',
+        'ipc_fuzzer_lib',
       ],
       'sources': [
-        'generate.cc',
-        'rand_util.h',
-        'rand_util.cc',
-      ],
-      'conditions': [
-        ['asan==1', {
-          'cflags!': [
-            # Compiling generate.cc with ASan takes too long, see
-            # http://crbug.com/360158.
-            '-fsanitize=address',
-            '-fsanitize-coverage=<(sanitizer_coverage)',
-          ],
-        }],
+        'generator.h',
+        'generator.cc',
+
       ],
       'include_dirs': [
         '../../..',
+      ],
+      'defines': [
+        'USE_CUPS',
+      ],
+    },
+    {
+      'target_name': 'ipc_fuzzer_mutate',
+      'type': 'executable',
+      'dependencies': [
+        'ipc_fuzzer_lib',
+      ],
+      'sources': [
+        'mutator.h',
+        'mutator.cc',
+
+      ],
+      'include_dirs': [
+        '../../..',
       ],
       'defines': [
         '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',
       ],
     },
   ],
 }