CpuProfiler: move StringsStorage class to separate source and header files.

src/strings-storage.h

+// Copyright 2015 the V8 project 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 V8_STRINGS_STORAGE_H_
+#define V8_STRINGS_STORAGE_H_
+
+#include "src/allocation.h"
+#include "src/hashmap.h"
+
+namespace v8 {
+namespace internal {
+
+struct OffsetRange;
+
+// Provides a storage of strings allocated in C++ heap, to hold them
+// forever, even if they disappear from JS heap or external storage.
+class StringsStorage {
+ public:
+  explicit StringsStorage(Heap* heap);
+  ~StringsStorage();
+
+  const char* GetCopy(const char* src);
+  const char* GetFormatted(const char* format, ...);
+  const char* GetVFormatted(const char* format, va_list args);
+  const char* GetName(Name* name);
+  const char* GetName(int index);
+  const char* GetFunctionName(Name* name);
+  const char* GetFunctionName(const char* name);
+  size_t GetUsedMemorySize() const;
+
+ private:
+  static const int kMaxNameSize = 1024;
+
+  static bool StringsMatch(void* key1, void* key2);
+  const char* AddOrDisposeString(char* str, int len);
+  HashMap::Entry* GetEntry(const char* str, int len);
+
+  uint32_t hash_seed_;
+  HashMap names_;
+
+  DISALLOW_COPY_AND_ASSIGN(StringsStorage);
+};
+}
+}  // namespace v8::internal
+
+#endif  // V8_STRINGS_STORAGE_H_