Add string pools to save storage.

core/fxcrt/include/fx_ext.h

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #ifndef CORE_FXCRT_INCLUDE_FX_EXT_H_
 #define CORE_FXCRT_INCLUDE_FX_EXT_H_
 
 #include <cctype>
@@ skipping 65 matching lines @@
   return std::isdigit(c) ? c - '0' : 0;
 }
 
 inline int FXSYS_toDecimalDigit(const FX_WCHAR c) {
   return std::iswdigit(c) ? c - L'0' : 0;
 }
 
 FX_FLOAT FXSYS_FractionalScale(size_t scale_factor, int value);
 int FXSYS_FractionalScaleCount();
 
-uint32_t FX_HashCode_GetA(const CFX_ByteStringC& str, bool bIgnoreCase);
-uint32_t FX_HashCode_GetW(const CFX_WideStringC& Str, bool bIgnoreCase);
-
 void* FX_Random_MT_Start(uint32_t dwSeed);
-
+void FX_Random_MT_Close(void* pContext);
 uint32_t FX_Random_MT_Generate(void* pContext);
-
-void FX_Random_MT_Close(void* pContext);
-
 void FX_Random_GenerateBase(uint32_t* pBuffer, int32_t iCount);
-
 void FX_Random_GenerateMT(uint32_t* pBuffer, int32_t iCount);
-
 void FX_Random_GenerateCrypto(uint32_t* pBuffer, int32_t iCount);
 
 #ifdef PDF_ENABLE_XFA
 typedef struct FX_GUID {
   uint32_t data1;
   uint16_t data2;
   uint16_t data3;
   uint8_t data4[8];
 } FX_GUID, *FX_LPGUID;
 typedef FX_GUID const* FX_LPCGUID;
@@ skipping 20 matching lines @@
           j -= gap;
         }
         pArray[j + gap] = v1;
       }
       gap >>= 1;
     }
   }
 };
 
 #endif  // CORE_FXCRT_INCLUDE_FX_EXT_H_