Restructure the ipc_fuzzer directory.

tools/ipc_fuzzer/fuzzer/generator.cc

 // Copyright 2015 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.
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/strings/string_util.h"
-#include "tools/ipc_fuzzer/mutate/generator.h"
-#include "tools/ipc_fuzzer/mutate/rand_util.h"
+#include "tools/ipc_fuzzer/fuzzer/generator.h"
+#include "tools/ipc_fuzzer/fuzzer/rand_util.h"
 
 namespace ipc_fuzzer {
 
 template <typename T>
 void GenerateIntegralType(T* value) {
   switch (RandInRange(16)) {
     case 0:
       *value = static_cast<T>(0);
       break;
     case 1:
@@ skipping 90 matching lines @@
 void Generator::FuzzBytes(void* data, int data_len) {
   FuzzData(static_cast<char*>(data), data_len);
 }
 
 bool Generator::ShouldGenerate() {
   // The generator fuzzer should always generate new values.
   return true;
 }
 
 }  // namespace ipc_fuzzer