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

tools/ipc_fuzzer/mutate/mutator.h

Index: tools/ipc_fuzzer/mutate/mutator.h
diff --git a/tools/ipc_fuzzer/mutate/mutator.h b/tools/ipc_fuzzer/mutate/mutator.h
new file mode 100644
index 0000000000000000000000000000000000000000..bb826f793e2891a0e0afc586bf7bf79dbcad1aa3
--- /dev/null
+++ b/tools/ipc_fuzzer/mutate/mutator.h
@@ -0,0 +1,43 @@
+// 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.
+
+#ifndef TOOLS_IPC_FUZZER_MUTATE_MUTATOR_H_
+#define TOOLS_IPC_FUZZER_MUTATE_MUTATOR_H_
+
+#include <string>
+
+#include "tools/ipc_fuzzer/mutate/fuzzer.h"
+
+namespace ipc_fuzzer {
+
+class Mutator : public Fuzzer {
+ public:
+  explicit Mutator(int frequency) : frequency_(frequency) {}

[inferno, 2015/03/16 18:56:35]

match the return type of frequency.

+  virtual ~Mutator() {}
+
+  void FuzzBool(bool* value) override;
+  void FuzzInt(int* value) override;
+  void FuzzLong(long* value) override;
+  void FuzzSize(size_t* value) override;
+  void FuzzUChar(unsigned char* value) override;
+  void FuzzWChar(wchar_t* value) override;
+  void FuzzUInt16(uint16* value) override;
+  void FuzzUInt32(uint32* value) override;
+  void FuzzInt64(int64* value) override;
+  void FuzzUInt64(uint64* value) override;
+  void FuzzFloat(float* value) override;
+  void FuzzDouble(double* value) override;
+  void FuzzString(std::string* value) override;
+  void FuzzString16(base::string16* value) override;
+  void FuzzData(char* data, int length) override;
+  void FuzzBytes(void* data, int data_len) override;
+  bool ShouldGenerate() override;
+
+ private:
+  unsigned int frequency_;

[inferno, 2015/03/16 18:56:35]

don't need this large frequency, just have frequency as a percent. maybe keep it
unsigned int, but leave comment on range. 0-100.

+};
+
+}  // namespace ipc_fuzzer
+
+#endif  // TOOLS_IPC_FUZZER_MUTATE_MUTATOR_H_